- Fixed concurrency / race condition issues with contraptions loading in during a collision cycle
- Reworked implementation model of minecart tracking and couplings
- Coupling items now get consumed when used in survival mode
- Added some player feedback when couplings cannot be created
- Fixed couplings disappearing on the client due to sync issues
- Wrenches can now remove minecarts in one hit
- Wrenches can now be used to remove couplings from minecarts
- Cart assemblers now attach themselves to the block above, no longer requiring active "sticky-ness" of the contraption towards it
- Minecarts can no longer be moved while a contraption is stalling them
