I see. I always spray the whole area I will be applying to and occasionally the back of the decal itself, so I have never had a problem with the edges sticking down and not letting the liquid out. I see your point though and appreciate the information.
My only real concern with the R-Tape is that during a wet application the adhesive on the tape seems to seperate from the sheet as it dries. I do not know if this is a real problem or not though. The tape peels away clean and easy and brings all the seperated adhesive with it.