Ill answer the question for you all. Mechanicals are a poor fix for bad tuned arrows and bows.
I agree, wholeheartedly. IMO, there isn't 10% (I think that's GROSSLY high, but I'll be nice) of bowhunters going afield who have a clue how to achieve bow/arrow tune.
They know if they put a fixed blade BH on the business end, they get poor flight. So, what's a quick band-aid? Answer is....they can screw on a mech. head and at least their FP's and BH's will impact together.
I've said it before and I'll say it again......OUT OF A WELL-TUNED BOW, producing adequate for FPKE for the quarry being pursued....there isn't a more devastating wound channel produced ....than with the large mechanicals.
I don't see the above paragraph occurring very much, though.