how much KE do you think you need for the rage to blade. i have about 60lbs. and do you think this Calculator is right http://thearcheryhut.com/calculators.php

Dunno about the calculator, but I would think if you are producing 50 pounds of KE, you're good to go.

I'd say with the way these heads open 50 ft/lbs would be sufficient. The designon these heads are awesome. I will probably be using them this year myself. I have heard some rumblings of a recall on the 3blades sold earlier this year.

Yes they did recall some. I still have a pack that I have to send back. Check their web site. They have details of the recall on it.