Many people struggle with Smith not being productive. I experienced the same with different Smith varieties from different sources.
However, one particular tree I had was exceptionally productive and I believe it was pure luck, that I got a cutting off a branch that was a sport of some kind, could be or not, it is just so productive.
Below is a video I took of some of the cuttings Im rooting now, I rooted a few to sell and to keep as backup for myself because 8 Smith trees is not enough
Oh I dont know if its legal, but Im calling it Smith MJS ( MJ Strain/Sport )