This is, obviously, ridiculous, but it was built mostly to check that the shortest possible hydraulic launch would still work. I changed the minimum length from 3 to 2 tiles to simplify the implementation.
There is actually a problem though if you use longer trains than this, if the train hasn’t left the station when the catch car disconnects, it thinks it’s arriving back in the station and will proceed round the layout at slow speed.
Honestly, a lot of the details don’t show up at this scale. The model is, as usual, more detailed than it needs to be. The issue is getting shading right. I’ve had difficulty getting the fins to look good.
The catch car is fully modelled, but it had to be spit into four sprites to draw correctly. The sprites for those segments are all basically identical, so I will probably make them exactly the same and drop the small details, especially now that the catch car is behind the fins most of the time.