1. Wings, fins, cockpit removed and filled. Inverted. Conning tower, deck, props and such added. 1/72 Hasegawa kit becomes a 1/700 scale submarine
2. Cloth wings, vertical fin at 85% final size. Propellors have two blades.
3. Twin vertical tails keeping the D.H. family shape
4. Butterfly tail using horizontal stabilizers with approximately a 1/2 inch long plug added for 1/48 scale versions.
Paint schemes decided at one's leisure.