these seem super easy to graft. I had some seedlings of the inferior type, and grafted on scions of the real deal PB fruit. It only took about 3weeks to push out new growth.
I have less success starting cuttings, and find that grafting is funner, so I took the fun option. I also like the strange tricks a rootstock can play, when pairing species for grafting...Like dwarfism, increased vigor, and resistance to poor growing conditions (like improper ph).
I will try to share some pics when they heal. I have plans to graft a bunch more.