Well DBD,
I don't think that ur getting more resin out of the stalks with this tech. If anything its only stressing ur plants. So it is possible it can add a tiny amount of frost from the stress, but u say u only do it for a few min and then go about harvest as usual. So I doubt it. But, if u think it works and its not too big a hassle for u to do, then continue to rock it man.

To really prove this u need to get a Brix/Sugar Refractometer. And show the the ave. normal Brix level of ur plants and the level after the hot bath. Exe. ur plants ave. brix before hot bath is at 20 and after u do the hot bath its at 22 or 23.
This wont show ur adding any THC or CBD, but it will show ur getting more sugar into whatever part of the pant u tested.
Just my .02
L8
MJ