Funny, I recall a kid writing in to *Dynamite" magazine back in 1978(?) claiming they and a sibling had both played Jawas in the scenes where Artoo was shot and carried off. With the passage of time it’s going to be harder to verify such claims, much like the occasional old geezer who claimed they were one of The Little Rascals.
Maybe someone can ask Warwick Davis if any of the other Ewoks were kids?
I can’t imagine any of them being allowed near the pyro effects going off on set. This wasn’t too long after the infamous Twilight Zone accident.
I’d be surprised if they didn’t swap hoods and weapons around to make new Ewoks for some battle scenes.