I would use strips of wood and C clamps with a heat gun. Go slow.

 

I made a plate I haven’t tried it yet but should work gonna slowly heat and clamp 

Because that's the sort of thing you do when you have access to a laser cutter.  Haha!!   

First attempt seemed to yield good results I wasn’t able to clamp every spot. I put it in very hot water in a tray clamped, then cooled with water. Here is  before and after. If anyone wants to use the jig let me know or want to buy one I can make you one. I’ll upload more pics after the next attempt to get it better

Edited September 1, 20222 yr by Daluvian