Used ratchet straps and furring strips to wrap the bottom skin around the bulkheads. Having some problems keeping the bulkheads straight and getting the skin to form properly to the bulkheads. I may need to refabricate a bulkhead or two or otherwise figure out how to get the skin to form properly. With the addition of the bottom skin, there is now room to add two more bulkheads, F11 and F12. Reading some posts about reinforcing those last two bulkheads on the online Thatcher forum, need to take a bit of a break and think these items through.