Been a while. Thought this should get a bump up. Still using this tool and it works great. Especially on my BB. For those who are shredding O-Rings, give this a try and never tear one up again!!
Just adding a new easy suggestion for the handle topper. A 3 cc/ml syringe with the plunger removed and cut leaving an inch or so at the finger hold end makes a great handle end for the carto tool. And I started using a 510 female to whatever you find female that gets inserted into the handle. You only use the 510 end, so the other side doesn't matter. Then plug up the ends with epoxy.
Adapter Female 510 to Female 901/KR-808 - MyFreedomSmokes.com