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!