[Kaimetsu]

Y'know, guys, when somebody asks how to do something, they generally don't want you to bombard them with alternate designs. They'd prefer you to solve the problem they showed you, not one that you think would be better.

Anyway:

Yes, setshape is an obvious consideration. To my knowledge, there shouldn't be any problem triggering a clientside component from the serverside, but I don't think I've ever tried it before. If not then, as a last resort, you always try setting a save[] or #P() variable to something that uniquely identifies the relevant player, and have the clientside section repeatedly check for such a value.