Two New Bulkheads

I tried to get the dimensions for the bulkheads using string tied from bulkhead "C" to "E", but this did not work. The string is just too slack and the measurements are very inaccurate. So I will build a frame to hold strips of posterboard to get the correct measurements. The string looks interesting though and it gives me a sense of what the skin would look like. Er, if it was made of aluminum and was not see-through and flimsy.