I use DAP rapid fuse....just make sure...1) both surfaces are flat, if you place tip on ferrule in dry run, there should be NO wobble, second, do not apply too much glue, and make sure you have very good pressure on it, not enough to push out all the glue, but not to leave a huge glue line, a thick layer of glue will crack and break apart pretty quick causing the tip to fly off. Also, do NOT put scratches/hash marks etc on the face of the ferrule as it will NOT help the tip adhere any better to it......., CA is designed to be a thin film between 2 very flat surfaces for best adhesion.