I love what you are doing with Che and Osage Orange! I planted 3 Che a yr or two ago with the sole intent of using those trees for grafting to my numerous native OO... exactly what you are doing!
I'm also a huge fan of Mulberry and have several native trees that I've released and cleaned up around so that they can do a little better. I need to learn your methods of planting truncheons to expand what I already have. I intend to plant a bunch of seeds this yr. We have lots of berries already.
You're doing great work! Keep on keeping on!