Grafing, has anyone done it with cannabis?

Just curious. Has anyone graf'd cannabis before. If you know what I'm talking about hooraaa.

There's a thread in here somewhere if you want to search. IIRC, the results were not good.

I saw a report of someone grafting pot to hops and it worked fine...at that time(1970's), the guy couldnt be prosecuted cause it was unclear how to define the pot plant...wouldnt work now legally...I've also seen trees that had been grafted together, one apple tree had 4 kinds of apples on it...