According to my past experiences, whenever i glue on the Tenergy 05 FX then used a roller or some weight to hold it down for a few hours to get a good adhesion, the rubber always begins its shrinking phase in which it progressively shrinks around the circumference little by little everyday. Both my T05 FX have shrunk significantly because of this. I have called Butterfly about this issue, and they said it is because of the weight/rolling. And on their website, it states not to roll/put weight on the rubber because of the spring sponge. If i can't do any of that, then how am i suppose to get a solid glue job and avoid air bubbles?
It is quite simple, glue as you do but just don't apply force, just roll it out onto the blade smoothly.
I go from handle to the top of the head not using a roller. Just kind of lining up the bottom first then slowly letting fall into place gradually from bottom to top, no stretching in the process.
1. attach the bottom while holding the top
2. I softly rub my thumb or outside my finger from knuckle to point out across it.
a video of this would be best anyway hope it helps.
ps a little shrinkage will occur anyway but by that time you probably need a new rubber anyway.