Originally Posted by JimmyMac

I do not think delrin spool cups are adaptable from 416 to BD5. They have different mounting dimensions. I think I looked at this option already.

I've only ran the CD/BD sleeve several years ago on my old original BD. But I do not think it was much stronger. It is too thin and lets the outdrives spread a little. The thick Tamiya aluminum sleeves do not let the outdrive spread at all.

Wear on the BD5 spool has been good so far. I do not have issues with them. But I am sure if you wreck front end, it might be easy to break because only the ring is supporting the cups. Buy many spares!