I planted a 1/2 dozen from Tree Pro I do not believe they are grafted trees but have survived just fine one is even two foot above a 5’ tube in it’s second season but the others are simply plugging along. This year I ordered 20 seedlings Chinese and 10 AU buck seedlings not grafted from Wildlife Group the 10 AU Buck seedlings had been grown in a air pruning system and had very nice root systems. I wouldn’t hesitate to order them again.
I got the impression that WG was having such issues with latent graft failure that they abandoned grafting them but I could very well be wrong in this presumption. Either way the likely hood of getting latter dropping chestnuts is much higher than any other source.