I have got the J1 drawings. They are not much more than a set of 3-views, with very few external details. Since the design of this aircraft was stopped due to the German invasion in 1940, the design is not complete. However, the engineers managed to make some calculations as well as the landing gear and the controls before they were forced to stop. There is definitely enough to make a model, but details regarding engine cooling, exhaust, aileron hinges etc. will have to be an educated guess.  Like the original, I will make two set of wings, one for bombing, and one for the fighter configuration.

Scale Dimensions:

Wing-span: 1.75 m
Length: 1.552 m