The colored electrical tape over screws sounds like a good plan. Glad I though of that!!

I've used the canope glue for the ones without the need to get under the canope, and I've used screws for those that I did have to get under. But, the ones with the screws, even though I used CA to harden the balsa, seemed to loosten up after a while. I've sort of resorted to backing up the screw holes with a small strip of ply to secure the screw into. I also add a little of the clear calking into the screw hole to try to keep oil contamination out. So far, it's worked.

I have a Seagul Super Star ARF that I am working on. It has a removable pilot's station including the canope, that is held in place with a pair of machine screws and two short lengths of ply underneath that slides in two slots similar to the dowls on the front of bolt-on wings. I may do something about sealing that but I have to get in under the canope to put the thing together. So, I will have to figure that one out.

CGr.