WorldStabilizer no longer works as of 1.11, it no longer protects against the 1km spawn bug (and its presence in 1.11 seems to cause the bug to evolve into a vicious kraken) so take special care when spawning crafts containing at least these parts, or don't use them anymore:

• J Deployment Bay
• J Inline Large Docking Port
• Avatar Cargo Ramp
• Humpback Cargo Ramp
• Stail Cargo Bay (Mk1, not Mk2)

Changelog

• Added KerbalChangelog support.
• Added Localization support.
• Added missing attach nodes to Avatar Inline SAS.
• Added missing SAS module to all drone cores.
• Added 2.5m "Tidal Force" power sphere. Produces 600 EC/s on LFO.
  • Re-titled all power spheres.
• Adjusted air-breathing performance of these engines:
  • J-60D. It was really lacking the high altitude runaway thrust behavior. I officially have a love/hate relationship with this engine.
  • J-60 stationary thrust to match J-60D.
  • J60, J-61: Added scramjet upper speed limit (Mach 15). Shcramjets don't have this so the Nebula doesn't get it.
• Changed J-81 title and engine behavior to reflect new fusion ramjet/rocket behavior.
• Decreased RCS thrust in Rudder engine.
• Fixed broken heat limit key in Stail bicoupler. (Spotted by @ Lisias.)
• Fixed cost (was way underpriced) in Bubble engine and Stail cockpits.
• Fixed K Drone Core's SAS module still missing.
• Increased thrust in these engines:
  • J-81 engine.
  • Valkyrie tilt & WarpJet MARGE.
  • VTOL wrapper engines.
• Moved the following to OPT Main:
• 2.5m Nebula Shock Intake.
• VTOL Wrapper engines for J and K.
• Avatar tilt and WarpJet MARGE engine.
  • DepthMask assets.
  • K cockpits (custom, TAV). All 3 K cockpits are now there.
  • K cabin and lab.
  • K and KH Inline SAS.
• The following VTOL engines remain:
  • Bubble.
  • EggDog.
  • HeliCarrier.
  • Low-Profile series.
  • Slipstream rudder engine.
  • Wrapper engines for Humpback.
• Nerfed excessive undeployed drag of airbrakes.
• Removed obsolete keys from some air-breathing engines.
• Removed extra lift module from K lab.
• Updated DepthMask patch to detect standalone DepthMask plugin.
• Updated offset between inner and outer stack nodes of Avatar and Humpback bays to make it less likely to attach them the wrong way and break cargo shielding.
• Updated Retro RCS. It can now be used as an engine, and has toggle-able staging. It also now has 3 color variants.

• Added/fixed science container and Crew Report experiment to Humpback cabin and Stail cockpit
• Moved J-60 and J-61 to Aerospace Tech/ Exp Aircraft Engines in tech trees

• Fixed Stail JSL cockpit cew capacity 2 (down from 5)
• Fixed Stail Lab crew capacity 2 (down from 4)
• Added SAGE and SURGE Enginges (JadeofMaar)
• Added K, KH, Humpback OMS units (JadeofMaar)
• Added/updated descriptions for some parts
• Added all cockpit and cabin lights to Light action group
• Fixed duplicate fuel switch options problem
• Removed fuel tankage from Science Lab(s)
• Increased IntakeAir amount in all cockpits (includes OPT Main) and added IntakeAtm which only appears when CommunityResourcePack installed
• Fixed all remaining bulkhead profiles, reversion to J and K from OPTJ and OPTK to sync with OPT Main
• Made proper texture for J60D Hybrid Screamjet (JadeofMaar)
• Raised joint strength of Humpback parts
• Incorporated Stealth Textures via FSTexture Switch
  • Stail Aerospike
  • Stail - Avatar Adapters (both)
  • Stail Drone Core
  • Stail - 2.5m Adaptors (Broken)
  • Stail BiCoupler (Broken)
  • Stail QS Cockpit
  • Stail Engine Mount
  • Stail 6 & 7m Cockpits.
  • Stail Lab
  • Stail Fuel Tank
  • Stail Tail
  • Stail Mk2 Adaptor
  • Legacy Pack Wings

** Known Issues

• Door on the 6m Cockpit
• Both Stail - 2.5m Adaptors not changing
• Stail Bicoupler not changing
• OMS units have no RCS/OMS thrust currently

• Added J-OMS
• Added J-Drone Core With OMS
• Set all J & K Parts to be hidden unless OPT installed.
• Corrected Juno cockpit bulkhead profile from J to OPTJ
• Corrected KTAV Custom bulkhead profile from K to OPTK
• Corrected KTAV bulkhead profile from K to OPTK
• Restored Humpback Crew Fuel config

Thanks to Winchester for the OMS configs

• Updated Legacy Pack License
• Removed redundant text files
• Removed OPT Main mod License

• Removed OPT Main mod changelog

• Removed bundled ships due to unauthorized uploads to KerbalX

• Fixed Moobien's ships (I think for sure this time)
• Restored some old OPT wings
• Fixed Science Transmission issue.

• Juno and Kraken Parts adjusted to bring in line with main mod
• Removed unused textures/parts

• Removed cockpits that have had texture updates in OPT Main 1.9
• Removed All Juno parts except for the 7m Cockpit
• Removed Engines present in OPT Main 1.9
• Created new .version file for OPT Legacy
• Renamed OPT folder to OPT_Legacy and updated cfg paths
• Removed IVA present in OPT Main
• Removed unused textures/parts

This legacy pack only includes MiniAVC

This version is for 1.2

• Full 1.2 compatability.
• Added Stail Bicoupler
• Updated textures
• Adjusted Juno 4m side nodes
• Adjusted Wing root nodes.

SPECIAL WARNING

This version is for both 1.1.3 AND 1.2

For 1.2 Users extract the contents of 1.8.6.rar into your KSP folder and overwrite all files. For 1.1.3 Users, ignore the rar file.

DELETE EXISTING OPT INSTALL BEFORE INSTALLING

• Please refer to changelog text file for complete list of changes.
• This is the final update that will be done for 1.1.3.
• Please delete your OPT folder before installing this version.

OPT Landing gears are included but please do not use them at this point as they are for testing purposes for those also running 1.2 (maybe someone can get them working)

• Minor MM patch updates
• Texture issues mostly revolved
• Removed unneccesary textures in 2.5m folder

• Renamed all fuselage profiles
• Added J-81 Hybrid Turbojet Nacelle
• Added new model for JSAS module
• Cleaned up Firespitter MM Patch
• Cleaned up Connected Living Space MM Patch
• Created Default Resource MM Patch
• Created Interstellar Fuel Switch MM Patch
• Created Real Fuels Patch
• Created Modular Fuel Tanks MM Patch.
• Moved common textures to dedicated folder
• Set texture referencing for affected models
• Added the people who helped with this project as easter eggs
• Added Custom KTAV cockpit
• Removed OLD K cargo bay & bicoupler
• Humpback cockpit model optimized
• Added 'tags =' to part configs for easier searching of parts
• Updated old 'mesh =' to 'model ='
• Changed Pylon A and Pylon B to Wing Root A and Wing Root B
• Experimented with inverted textures (looked kinda cool) But put on hold.
• Added side attach nodes to Juno and Kraken tanks/bays
• Added Hyomoto's Antenna blade and updated its texture
• Reorganised folder/file structure.
• Some models optimized.
• Adjusted cockpit masses
• Removed Chimera cockpit
• Consolidated remaining Chimera parts into Avatar Parts

• Added J Freight Parts
• Added B Drop bays
• Removed L Cargo tail Deploy Limit (because of how it opens)
• Removed A Cargo tail (didn't open anyway)
• Added FS patch for L bicoupler.
• Fixed Mk3 Shuttle Nose

• Added old hollow K parts as C parts, added Deploy limit to C Cargo Tail.
• Added old J-QS01 cockpit as B-QS01
• Added old 'integrated' wings as 1a, 1b and 1c
• Used the fixes uploaded by AccidentalDisassembly as basis to roll into new version.

• Version Numbering Changed to bring in line with K.Yeon's system.
• J Drone Core Copied and edited. J SAS Module added using J Drone Core Assets.
• Added AVC Compatability
• Fixed A Cargo Tail appearing as Bi-Coupler
• L Cargo Tail fixed to have Deploy Limit.

Added CLS Patch - Moobien (stali79)