I would of originally posted it here, but trying to keep track of 1 post in a thread with a large number of contributors will quickly have it buried under pages & pages of posts; so i created a github issue and it hasn't even been seen yet; https://github.com/jakj/Redstone-In-Motion/issues/1. For those who don't want to read it the idea is a rotational carriage engine with a CC controlled variant that'll work for all 6 directions.