I will be mounting some 3-blade Woodsman broadheads on aluminum adapters to convert them from glue-on to screw-in. I have no clue how to get them all straight and centered and this is my first time doing this so all help is much appreciated.
I used to be fanatical about it back in the old days. Nowadays I don't even look at it.Use hot-melt glue.
Attach a broadhead onto an adaptor, and when it cools, screw it into an arrow and spin the arrow. If the broadhead is not straight, heat it to soften the glue, give it a twist to realign it, cool it and test again. Repeat if necessary.
I wouldn’t be concerned about aligning the blades with the fletch, but others may disagree.