Could you describe the extensive testing protocol you put the Tac Vanes through?
Yep. Purchased the TAC Driver 2.75 vanes (all the rage when first came out) and the pen, glue etc. - all the crap - all of which is highly priced.
Tested them on my wrapped RIP arrows vs. blazers for flight, adhesion and durability. Even with the expensive adhesion crap they sell as they admit they are tough to deal with on adhesion and thus require their own "formula" I still had some adhesion problems. A few didn't stick great off the bat but most I was able to get to work. But then with use it wasn't uncommon with any impact or pass-through on target they would start to come off. The stiff material is not very durable - but this was no shock to me as the same is true of fletching like Flex Fletch which I tested many years ago.
Flight was the big thing. Fine with field points obviously but they didn't stabilize fixed heads anywhere near as well as Blazers. I tested them at ranges from 20-40 yards using either 3 or 4 different fixed heads (can't recall for sure which). The TAC vanes were even worse in the wind. It became quickly evident they were a no-go for hunting purposes.
I then ordered the Summit vanes since they are basically a carbon copy of the Blazers but slightly smaller. Same issues on adhesion and durability of course but they did work better with broadheads. I would say they were very close to the Blazers but not quite there. But then they cost way more than Blazers, require special glue nonsense, don't stick as well and aren't as durable.
Sold it all - simply not worth it. Frankly even if they were just as good as Blazers they wouldn't be worth it given the high price. I was hoping they'd be better, in which case I would have been happy to pay the price. But they didn't even measure up so there is zero chance I'd ever use them for hunting nor would I recommend them to anyone.