Here are a couple of grafts that I have on M. californica. I've had plants push pretty hard and then just brown at the tips and die. Some have dieback on the uppermost parts of the scions while still having healthy buds below, others have just deteriorated quickly and been dead scions.
I really don't know what to expect on takes because it seems like they can push a while without having healed. I did graft pretty ginormous scions so wondering if I'm running off stored energy.
On a seperate note, I think I'll probably have ~50 survivors out of 70