Piethein, i didn´t understood very well about the nose strut, so i did a quick draw of it... if you are
using the first example, you could have trouble in the TO run. I use the second example, and in
my opinion , as the distance "d" goes greater, then more stable the TO run. (no need to install a gyro) Another point is that I didn´t use a totally rigid steering setup. I left a about 5 degrees each side of steering slop. This setup works very well to me, making takeoffs uneventful, even in crosswinds.

I´ll post later a pic of my 5+ years old homemade strut.

All the other items listed seemed fine, specially the turbine angle.