Dambest carbs, anyone using one

I was looking at boosters, trying to figure out what I want to do for a carb for my 470, I ran across the dambest shear booster video on YouTube.
It's a very interesting design, he also makes a real nice billet main body and other parts, uses all reinvented carb parts.
Well I'm just wondering what any of you know 1st hand from ownership & real comparison vs typical-traditional 4150 carbs.
That being said I am also leaning heavily to blp 850 builder kit specifically & adding a 16 hole annular booster, Average flow of 1060 with their downleg.