You could say that RFJ, but in the RCM&E article Stu mentions only that the Thunderstormer he was flying had got a bit heavy, so he took the best bits of it into his new (Equaliser) design. Doug must have done much the same exercise, and come up with a remarkably similar result, Twister. Perhaps the two models were hatched about the same time. But enough speculation, lets not let this turn into another Taurus thread, what! I have a Veco .61 NIB that I think will be perfect for a Thunderstormer, when I get it built. So many planes, so little time...
Evan.