My first saber had the film glued in place. First time I dropped it tip first it wrinkled in a spiral all the way down the blade. The last three blades I got were not glued and do not wrinkle on impact or from drops. I've never had a problem with the film coming out even a little bit. I would recommend not using glue and just removing the blade with the tip pointing down. Just yesterday I took the wrinkled film out of my original blade and replaced it with cellophane I got at a hobby shop. Darth Cephalus has a great video on how this all works.
https://www.youtube.com/watch?v=_iBnWdlEtsk Hope that helps.
Thanks, I will give that a try. I was concerned about wrinkles because it’s sliding out so much. When I removed the main blade to my Flamberge the other day there were 4-5 inches of film sticking out the bottom. I turned it over and it went back into place but it’s making me nervous.