Same here, my 4 all have play, one has enough to rattle, very annoying, but I've learned to rest my thumb on the side of it. I might have to slip a little piece of felt with sticky backing between the lever and the trigger, sticking the felt to the lever so it doesn't rattle against the trigger.
Hmmm, might have to look at that tonight while I'm sitting next to the wood burner keeping the house warm.
later,
scruffy