This was a bit tricky, but I used some really strong brown binding tape on the bottom so it won’t slip while clamping and made some lines from he headstock to the neck for alignment.

Originally I thought I’d just use one large quick clamp which would exert about 300 lbs of pressure, then I split it with two large clamps on the area between the neck and head, and two smaller clamps on the part closer to the headstock. So far no disasters, but well see how it works out in a few hours when the clamps are pulled off.