5Shot- I have been shooting these heads for the last couple weeks and have found that they penetrate almost as well as all of the fixed position heads that I have used in the past. They shoot right with my field tips and by the way the blades open you lose virtually no energy when the blades depoly. Accoring to G5 it only takes 1 pound of energy to fully deploy the blades on the Tekan.

However with that said, it does concern me that you lost blades during your tests. Would you care to go into a little more detail on exactly how the Tekans lost the blades? They blades are .40" thick so I would have thought that they would almost be unbreakable.