Daniel is correct. I use the EbN style rack. The rack that Daniel linked to is actually the rack that Sean uses for his boas. I use the exact same design, just for a smaller tub. I also eliminate the center brace from the wooden boxes, as they are not necessary for the samller tubs. I use CB-70's by the way. I am offshore right now, but I should be going home tommorrow. If you need any help, just give me a call, or ask and I can take some pics of anything you may need help with.