This sounds like a great idea, but the A6M2-N's loaded weight is less than half the weight of the Typhoon (5400lb vs. 11400lb). Therefore the Zeros float is only about half the size necessary for the Typhoon. I don't know how hard it would be to increase the size of the float or maybe you could use one of the floats from the A-20 float plane (https://www.sas1946.com/main/index.php/topic,15278.0.html). The A-20 is slightly over twice the weight of the Typhoon.
Hope you are successful ,,, I enjoy seaplanes!
Not too fussed about that - will do a quick calculation and stretch the float in length, beam and draught accordingly. The Zero's float isn't fully immersed, only about 45% by eye, so there is plenty of reserve buoyancy. Also, one of the advantages of increasing volume as compared to other dimensions is that the relationship between length and volume is cubic - i.e I won't have to double the length of the float to double displacement.
Other floatplanes will follow in time. I will not produce frankens of the F1M and Kingfisher - but I may tackle them in time as new 3D models. For now I'm going to finish the Stranraer first anyway.
The jet flying boat you're thinking of is the Saunders Roe Squirt. I saw the surviving prototype a few weeks ago.
-Matt