Veeerrryyy interesting...
We had 2 Mach 1's in our club back in the mid 70's...one guy had a Webra speed in his and I always loved the way it flew...

There was also a Mach 8 that came along sometime later...it looked very much like the airplane in the above pic.
(after looking at that pic some more, I realize that that plane is too big to be "40 sized" )
The Mach 8 was featured in RCM I believe?