How big is to big for a red dot sight for GSSF match. I have a Optima w/7mil dot (ok, actually it's the wife's 24c) which I find a little small for me (old eyes). I am now going to do a G17L with C-More sight. Would like to go to 16 mil dot. Comments please. Generally the gun will be used for pin shots, and general plinking, with maybe a GSSF match once a year.