I'd love to see a way to limit how many of each item will load into a chest cart via a hopper.

For example, if I have a loop that goes eggs -> carrots -> unload, be able to limit the contents of the cart to 32 eggs and 64 carrots, and if the unload doesn't drain the train, the next time it comes to a loading location, it detects that there are already eggs on the train and doesn't load anymore.

Alternatively give a way to connect other mod's item transport directly to the inventory of the train and detect the contents for existing stack size limiting.

This will be solved by #245, keeping this open in the meantime