Fair enough. Getting a usable API that works reliably here is tricky though. I've often fallen back to a sort of indirection like "move this card right after th

Fair enough. Getting a usable API that works reliably here is tricky though. I've often fallen back to a sort of indirection like "move this card right after that one" ... this only works if you can calculate that right away since that card can be moved by some other agent.