I have read a bunch and done quite a few tips in my days but I have one that has been kicking my butt. Customer has a joss cue not sure if the ferrule is the original but he brought it to me with the tip halfway popped off for a tip. I put an elk master on using gorilla ca gel an with a centering jig in my tail stock . I press it on and leave it for about 5 minutes, tip came off next day so I tried another using loctite ultra control gel same issue. Then we tried an ultraskin same thing again. I am singing the tips facing the ferrules and I usually do not score the back but I tried that too. The tips after they pop off look like the majority of the tips is covered in glue and very little on the ferrule. Almost like the glue is not adhering to the ferrule. I am at wits end and told the guy I would put him a different ferrule on and try that I do not know what else to do. Any advice will be greatly appreciated