for my high-wing trainer I have the best access and space on the fuselage below the wing, but it is going to be a pain to see when doing pre-flight because the wing will be blocking my view as I stand above the plane.

I hope I can find room to install it on the top of the fuselage behind the wing, but space will be tight. I might even do a fully external install on top of the fuselage behind the wing. If external, I might build a little aerodynamic structure around it to reduce drag.

here is a photo of my airplane. http://www.hangar-9.com/ProdInfo/Lar...es/HAN2550.jpg
so I am thinking if I have to go external, then on top of the fuselage behind the wing might be the best external location?