Yep - the front two can go just forward of the front beam, and the back two go just forward of the rear beam. That'll keep your hulls off the ground. Easiest way, track it into position, lift the bows to pull the trax, and set it on the front scales. Then lift the stern, pull the chocks, and set it on the back scales. You might need some help with the math.

Rub it down, flip it and reverse it to take it off. If you have scales that can be zeroed and show one decimal place, they can be used to get an official weight. Most can show Kgs as well as pounds. 180kgs is the official weight for an F18 - check the rules for what can be included (compass, righting line) and what can't (wrench, sponge, empty beer cans). Weigh it dry and mast down to emulate weigh-in at a regional or NA Championship.