Wayne,
I use a 3/4" blade from "Busy-Bee" for my Lam's, it's a 4 tpi, but I make sure that I use it ONLY for wood the minute you touch it on fiberglass all it is good for then is cutting out the bow and sight windows.
I have tried them all and there are none that keep the set in the teeth once you cut fiberglas with them, I just make sure I change blades between cutting lams and glass work.
Good luck.
Bert.