twisted trees
Omono
I've had success with in arch grafts and I am still waiting on some thread grafts.Yes you can graft in a few different ways, at least on American Larch. I am assuming you could on others. Thread grafting is most popular, Lenz talks about it in his book. Crust has posted successful thread grafts on this site. I have one that appears successful but I am giving it another growing season to make sure.
This tree doesn't need grafting though...imo