Steve,
The picture I was refering to was to take one simular to the one with the ribs on green paper, only taken from dirrectly overhead, with the distance from spar to leading edge marked on each rib. The 15" tread that I mentioned refers to the distance between the main wheels as they rest on the ground. As yet I don't have a duplicator that you show in your pics. Looks like a handy tool to have.
The scale tires that you refer to, 660 x 160mm are for a late model G-2, while the CMP kit is for a BF109F-2 wich had tires that scale out to at a scale of, 5.4/1, to 4.739" x 1.094". You can only STUFF a 4.0" x 1.0" wheel in the area between the main spar and the leading edge.
Even then part of the tire is above the plane formed by the skin. A way around this might be to thin the width of the tire and even with that, the strut is way above the plane of the skin. Also you will find that as you move the pivot point outboard to improve ground handling the available room for the wheel gets smaller. You almost have to set the tire in the well, flat against the top skin and touching the main spar, this lets the wheel travel up AND forward, clearing the leading edge. Then determine the angle that the axle makes with the strut and use that to set the strut/axle angle. On the subject of the strut, what are the diameters at the ends and what type of al did you use? I have a lathe and milling machine and could fabricate the struts. On getting timed out, every so often I do a ctrl C on all the text and if I get timed out the majority of the text is still available with a ctrl V. My flying buddy cured his ground handling problems on his DR1, with a gyro controling the rudder. Tracks straight down the runway without a hint of ground loop. As you my have guessed, I'm retired and hateing golf, spend most all of my time in the workshop aka garage, with my moto being "It's never to late and you're never to old to have a happy childhood."
Bob Q.