I bought a used Cat 0 3ph from a guy on FB and was going to install it on my 445. I thought it would be a snap like the others I have fabbed using the existing rock shafts. When I went to take a look at the rock shaft I was floored! It is smaller than the old 318 series! They were 1-inch and the 445's is 3/4-inch! I looked a Ruegg's 3ph and he replaces it with a larger diameter shaft but he also wants over $200 just for the shaft. What was JD thinking? I guess they were thinking that if you wanted a 3ph you would need a new shaft anyway so why give you a nice strong one to begin with. I am trying to think of a way around this obstacle. Any ideas? I have three old 318 shafts and was thinking that I might be able to use one of them. The 445 shaft has only the two hydraulic cams and no end levers like the 318. I could remove both end levers and make two new bushings for the one-inch shaft. I'll have to measure it so see if it will fit. It's things like this that keep me going. I love to solve problems that don't involve the IRS or my bank account!