I run the HDC-5cx, its a slightly revised version of the original 3 disc. I love it, Yeah Gary and all them on horstman pretty much dont make DXL parts anymore so unless you have a 30 year collection of parts, I would just stick with modern clutches like the L&T or the HDC. 3 disc for pipe class, 2 disc for can or junior class. 1 disc is just a bad idea