Well, I guess I will guinea pig it then. I have an MT-G2 on a noctigon and a 3' piece of 1-3/4" Aluminum round bar stock, with plenty of 14 ga wire. The 20R batteries might come by the week-end, (wishful thinking, since it's now Thursday), so when they get here, I will see what I can do with the 3 drivers in master/slave. I should have over 9 amps from them.
The light I want to do this to is this one, which should get here in a week or so... https://budgetlightforum.com/t/-/20312 I want to do reflector tests on the light, to see if I need to drop it down to die height or below die height, to get the tightest spot from the led.
I was figuring on 2s/2p with it and the Panasonics, but I will have four of the 20Rs, so there should be no excuse about the batteries not hitting 9 amps.