I have had my first two attempts last year at replacing/installing shafts and my second set of MMB-17’s came out pretty well. However, after a couple of rounds, a couple of the ferrules moved or the epoxy didn’t set well enough for the ferrule to stay in place.

I used the guide (very helpful) and applied a small amount of epoxy to the ferrule prior to sliding onto the shaft but it didn’t seem to take on a couple of irons.
Should I apply more epoxy for the ferrule? Is there a better tip/trick to keep these in place? Can it be re-epoxied?