This is proving to be a global project. The angles I recommend are from the Morelli/ Aptera shape and match those found on vintage sailplanes. The ground clearance, 4" plus, should keep the tail high enough. The latch receiver plate need only be a piece of metal as the locks come in different lengths.
Sendler and I occasionally butt heads which is one reason I always wear a helmet
If anyone is interested we have the National Sailplane Museum and the Glenn Curtiss Museum nearby. Curtiss built motorcycles before getting into aviation. It's about 2 hours from Syracuse.