Lot's of good suggestions.
I'm a little embarrassed to admit heating up and turning the insert didn't occur to me, I hot-melted them into place to begin with...
Admittedly, it's been a few years since putting in my inserts. I bought three dozen shafts several years ago and cut to size and placed inserts at that time and haven't done it since.
I just fletch a 1/2 dozen arrows when needed.
It's time to order new shafts so from here on out I'll align broad head / insert to knock before fletching.
Thanks for the great input!
PS:
Aluminum Easton Shafts, two blade Magnus Stingers; using hotmelt.