Da Rock,
I've used the same method you use for years now. I would glue the canopy on and then use tape to hold it in place. Until I saw something here on RCU awhile back (I've looked and can't seem to find it) that made doing this even easier. And after I saw the tip it was definitely a "Doh!!!!!!" moment. It made perfect sense after I saw it. Instead of taping the canopy in place use a Ace bandage (yeah, they type you use when you sprain your ankle!!) to wrap around the fuselage. This provides even pressure to the entire canopy as the glue dries. And when you remove the wrap it won't stick to the canopy and risk pulling it loose from the glue. I've used this a couple of times now and it's a great tip.

Ken