I like to do my own with all my Bheads
I acetone the adapters, and make sure my fingers are clean as well so I don't transfer any body oil to the adapters screwing them in.
I sand the inside of the furrel and then acetone it with a Q-tip and get it clean. If the inside of the furrel has paint in it, I acetone 1st then sand and acetone again.
I screw the adapter onto a shaft, and use 5 hour epoxy(2 hour will suffice)...wipe off any excess around the base unless it an even fine bead and then I leave it. Make sure its seated, and spins true, and let cure.