Finally got the new neck after tracking it all over Asia. Looks to be in good shape! I opted for the paddle type headstock so I could go a 3+3 orientation without stuffing it into a Fender style headstock area.
Bonus, this actually has a break angle at the nut! Which will solve another issue I was having.
I sketched out a better string path and made my holes. Already lookin good

Here's where I run into issues...

Obviously, the neck is not designed specifically for this kit.
So it is about 2.75mm thicker at the heel, and the shape of the heel does not quite match the pocket on the body.

I know what I want to do, but I thought I'd take the temp of the community to see.
Would you either:
1) trim the neck to fit the pocket
-or-
2) trim the pocket to fit the new neck

ps in the intervening weeks I purchased a router (big boy stuff I know) so with a combination of router, rasp, file, and sandpaper I would prefer to trim the heel of the neck.