This is rather niche mod and can be of interest if you make some complex contraptions with Infernal Robotics (both "Classic" and "Next", and note, "Classic" has an unofficial recompile for 1.6.1) and/or DockRotate or similar stuff with lots of moving parts.

Infernal Robotics is infamous for its wobbly parts that also drift apart after time warp or scene change. This mod partly solves this issue by doing following things:

• First, it allows internal collisions between certain parts, so if you stow one moving part against some base part, chances are fair that after time warp it will remain in the same place.

• Second, it creates a joint between "lock halves", and it increases chances even more.

• Third, by creating said joint it can enhance the stiffness of your contraption in general while allowing movement when this is necessary. In that this mod is akin to ActiveStruts, but with internal collision feature it also can enforce some fixed predefined position.

Super-neat lock model was created by @ZodiusInfuser in his marvelous style of Infernal Robotics Model Rework.

Some examples: YouTube

Supported versions of game: 1.3.1, 1.5.1, 1.6.1, 1.7.x, 1.8.x

See releases page on GitHub: https://github.com/whale2/InnerLock/releases