Yes, all true, but Hollmann was also known for overbuilding and over-complicating things... some distance past the point of most other successful homebuilt aircraft. stanislavz, if you have accepted the concept that you want a steel tube cage around the pilot, then (like it or not) you have accepted 2/3 of a full steel tube fuselage (plans-built Tailwind). Be careful, you may be expending a tremendous amount of energy (and accepting a lot of additional complexity) by going on a "holy quest" simply to prevent the other 1/3 of the fuselage from being made of steel tubes I speak from experience, I have made that same mistake many times and looked back with great regret! Although this does differ somewhat from your original intention with this thread, what if you built a composite wing and tail to "modernize" the Tailwind, and accepted the standard steel tube fuselage? Wittman's hand-drawn airfoil for the Tailwind wing was good, but there have likely been more recent airfoils that would offer some amount of improvement for this use. You could increase aspect ratio slightly, and even use the advantages of composites to eliminate the wing struts. These slight improvements could easily yield an aircraft with a 200 MPH cruise speed on 140-150HP. The very best Tailwinds here in the USA will achieve 200 MPH, but this is with 160+ HP and an extraordinary amount of fine tuning, aerodynamic improvement, etc.