I don't know. I don't really feel like fussing it. the shutter lasts less than half a second and kind of sounds cool. it's not surging or anything. maybe after a few months when I know the spring is nice and broken in I'll add a shim. probably not, though.
if you listen, you would know something was wrong before anything bad happened probably. search turbo surge on youtube. people do it for fun for goodness sake!