I've used roo glue, it's referred to as a vinyl glue, dries pliable and clear for the most
part. It isn't on my cue now because I needed it back up and available next day after a
nasty hard fall on a concrete floor, the acrylic ferrule exploded .
Roo Glue takes all of 24hrs @ 70 degrees with 55% relative humidity to totally cure
before machining. The next trick is the right amount of squeeze out during application on a straight flat clean surface.
Just simply have cue fixed upright, apply glue on both surfaces, lay prepared tip on
cue till you get a nice even bead around tip and walk away, do not fuss with it, no
clamping because you don't want to squeeze out the cushion you're looking for.
Come back to it in a couple of days to finish it up the way you like it.