Hi all; I was just wondering if anyone has any experience using any of the Tapmatic tapping heads on an X2 or other small machines. You can see an example of them here:
http://shop.ebay.com/i.html?_nkw=tap...=p3286.c0.m301

I'm looking to do lots of 4-40 tapping in aluminum and these heads seem pretty solid. Any thoughts or experiences? Thanks!

Mike