Clamps, clamps, and more clamps. Wood clamps, metal clamps, spring clamps, furniture clamps, whatever I had. Here I am bonding the inside sheer clamp. It helps to have tons of shop clamps around for this type of project. I decided not to use any screws to hold the sheer clamp on, preferring to trust a good epoxy bond.
I did not bother with clamp pads. This was fine because I sanded out any minor wood dents later. I just could not have using pads under all of these clamps.