Doesn't make any difference. With hot melt glue, you can reposition the heads by warming them a little.
BD, if you use a more permanent glue, and you don't get the broad heads aligned correctly to begin with, there's not much you can do to realign them. Enough heat will usually break the bond, or a drill bit in the hollow shaft if you're shooting carbon or aluminum. Then it's a matter of starting over. I.e., clean out the head ferrule, make sure there are no lumps of glue left on the adaptor, wood taper, etc., and reglue.
I turn the shaft/adaptor in the broad head ferrule a turn or two as I push it in to squeeze out excess glue. Then, of course, I spin test before the glue cools. If the head is on crooked, I press the tip down at an angle in the opposite direction on a hard surface to straighten it. Test again and repeat as necessary. With hot melt, this sometimes requires rewarming the head.
If you have a glue that sets up fast, and you don't get it right quickly, see the second paragraph above. Good luck.