Home Depot has the QuietBrace sheathing. I can also get blueboard or similar insulation material. The QuietBrace is actually less expensive. So that works for me. I've read the stuff on "Leg-a-matic", if I can afford those, I'll try and get some - much better than carriage bolts or hex bolts. Unless anyone has a better (cheaper) suggestion? I will still be using stud walls for taller platforms.