Will need to look at mast and keel placement given the probably different center of resistance and effort from original!
What do you think about a possible use of balsa for all interior structure and then epoxy coated paper for hull surfaces? Or maybe the aircraft type of film covering? With the hull shape, I have a feeling the lead will be rather light compared to others - and the hull should be easily driven. Perhaps an alternative keel for heavy air?
We are looking at about a 300% enlargement from the 8x10 drawings, (approximately) I will measure and calculate tomorrow. Need/want a set or are you working from the offsets?