I just wanted to start a thread to say how much I like this tool. I bought one about two months ago and have used it while building two dozen arrows. I used it to square off the ends of the shafts, the inserts and the Uni-Bushings. I check my arrows on a spinner to make sure everything is straight. I believe that my groups have gotten smaller since using it. Just last night I was installing my BH's and with one BH/Shaft combination, the BH wasn't spinning right. I did the old method of trying different heads on different shafts and it just wouldn't work. Then I remembered the tool, duh! It was sitting right in front of me on the table and I never thought about it. Put some marker on the bushing, gave the shaft a couple of twists in the tool and screwed on the BH. Perfect alignment! If you don't have one, get one. You won't be sorry.

Great tool! Bought one last year and use it the same way you do. Spin them and shave the wobbling ones w/ the A.S.D.Amazing how many new inserts are not square/true.With this little jewel, it's a snap to fix.

This is the one device I have yet to buy and yet I think would be extremely beneficial. I am probably going to end up ordering one for the local shop and just using it on my arrows as well. Thanks for the tip.