Something like rail with a cart. Not like vanilla minecraft rail, but a bit better for some tasks.

It should work mostly like piston, but in kind of reverse: some cart sliding on the some track.

Rail should have three endpoint variations:

1. Default. When this piece is moving, all connected pieces are moved as well
2. Not connected. Cart can pass through connection, but this piece doesn't move neighbours
3. End. There's no connection at all, and cart can't pass through this one.

Rail should be freely placable on every face in every direction. Cart will go when track is powered by mechanical force. When static, cart will act as a block. Rail block, where you place the cart, gets kind of mark, so you can see, where start pos of this cart is.

BTW, this mod is awesome

Hi, I'm not sure I fully understand the mode you're describing. What is your use case, what do you want to achieve? Maybe a sketch or screenshot would help describing your feature.

It's like rail platforms you can see in Portal 2 game (it's quite hard to find screenshot with them).

Again, some rail placable on any surface in any of four rotations, and cart, placable on this rail. Rail can't bend in any direction, but you can use any other actuator to change rail.

Hope you understood me correctly

Thanks for your suggestion, it has been added to our public submission sheet.