RE: Broadheads...To change or not to change
I, too, have shot a bunch of broadheads over the years so am no novice. One thing I haven't shot is mechanicals and for my own reasons. That being said, I think there are two broadheads that have a lot going for them and I'll state why.
They are Muzzy's and InnerLoc. These both have blades that slide into the front of the ferule and the point screws on. This is a nice feature for a couple reasons. One, once you have spin tested your head and aligned it with the shaft you don't have to loosen it to change the blades so the integrity of that alignment is left alone. Two, there is a solid piece of that ferrule behind the blades so in the event you hit bone the blades don't get driven back through a washer like some broadheads use. I've driven through that washer on occassion with the result being that blades came out in the animal. This makes for a precarious gutting job as I don't like cutting fingers off.
Of the two I like the InnerLoc simply because I think it is machined with tighter tolerances and the tip actually has a steel rod that enters the entire length of the ferrule. I think this is stronger than just screwing a tip onto an aluminum ferrule. I've also had better luck tuning them. I know some people who have had tuning problems with Muzzy's, but I don't consider the head the problem. It's akmost always an alignment problem or a tuning issue.
My best advice would be to use the off-season to experiment. My goodness, there are 7-9 months a year to answer all these questions for yourself. Goodluck.