yeah makes sense and also I've only seen like 1 or 2 trains that weren't built by me actual use a proper valve gear instead of engines or thruster's

Yeah I should have mentioned this too, one of my requirements is a system that operates flawlessly on physics 4 or even lower, which is especially needed for locomotives with complex details, or ones capable of pulling a lot- more stacked pistons are needed for more power, but substantially increases lag. I already have a few improvement ideas for my valve gear, but it will still take time to develop. I do however invite anyone else with interest in this to try to develop their own advanced stuff, it's a part of the technical community that seems to be a bit absent.

I've used valve gears that can actually revers and move a train but there kinda week in that it isn't that good at moving anything above 3-5 train cars it does work at physics level advanced-7 so its fairly stable in that regard

Also, it's very unlikely to find valve gear in the game because many people either avoid them, or fake them, and there are a few good reasons why:

1. SM piston engines need timing advance to counteract delay caused by logic connections. This is a huge barrier with valve gear as it's difficult to find a good working geometry to comply with this.
2. The expansion link is only good for switching direction, but can cause inaccuracy of the timing.
3. The increased complexity increases lag substantially, and provides an extra source of inaccuracy or failure due to the games physics.

I won't be uploading this as it needs to be further developed, and a part of that is waiting for the game to update with new physics optimizations. It's currently working well, but not good enough for real application.

can you give blueprint? I've been looking for something like this for a long time and haven't found anything

ok now make one with the proper lengths and angles

TRAIN!

How did you do that????? please show me i have been wanting to make that for so long