Double the engines, double the wiring. Level of difficulty is the same as a cozy. Same construction techniques. Although I can't calculate it acurately, the surface area that needs to be filled, sanded and painted is much larger. Double the cowls. Basically, everything has to be done twice. You have to buy 2 of everything. I estimate that I used at least 6000 hours of build over 5 years. I built a Varieze in 2 years prior to the Defiant. Took maybe 1800 hours to build that one.
John Steichen