You have your choice- fog, strength, setting time. No glule I know of is ideal in that it doesn't fog, but gives a really strong bond and dries or sets quickly. All CAs can fog, depending on phase of moon. White glues and such do not fog, but lack strength and take a long time to set. Epoxy doesn't fog, does give a very strong bond, but even five minute stuff really needs to cure for about twenty four hours (about same as white glues and derivatives) to maximum strength. White glue is certainly easier to use than epoxy. Strength is not essential for canopies- if it comes loose you can glue it back on. But for windows that have to be applied from inside of fuselage before closing same, strength is essential. If it pops in after fuselage join that is a disaster! Some folks have suggested Loctite's GO@ for transparencies. After having bonds made with it fail, I did some tests on it and couldn't get it to be a strong bond. Went to the loctite web site for GO2 and it specifically says "not for styrene." Bond strength seems to be about the same as white glue and similar.