I run a Kool koat system that came with the old style hoppers. I needed more hopper so I ordered the updated ones and mounting bracket. These make a HUGE difference over the old style ones. No surging, use way less powder because powder flows so much better out of these. Also with the brackets, you don't have to worry about hoppers tipping over while working around a peice. Money well spent to upgrade an already awesome system to make it just that much better
I use one for clears, one for blacks, and one for whites. Easy to clean the latex tubes out with ear plugs or cotton balls (kids love that). You can't be sure they're totally clear, so order lots of hoses--one for each color family along with replacement o rings for the barb. Powder flows out fantastic!!! The copper tube falls off a lot but it makes it easy to clean, I suppose. A little fragile