VA, I've never had to do any of those things. With a good quality head (not some bargain basement crap).

I just screw'em on till they are tight, of course you have to make sure it's a good arrow shaft. (straight with good fletching). It's my belief if your bow is tuned and centershot is achieved. Then they'll fly where you aim'em.

If you really wanna get dialed in a nice helical seems to make broadheads fly much better than standard straight fletching especially when any wind is involved.