Hello all: I have been sitting on my duff reading old posts on lawnsite. In a couple of threads people have mentioned a hydrostatic tranny on the snapper rear engine riders. I checked out the snapper website and it doesn't have anything other than the disk drive. Is this something they used to make, and if so is it a tricky retrofit to replace the disk drive? I'm sure Restorb will rip me for even asking this question, but I have spent too much time getting the disk height perfectly dialed in only for it to slide down the crankshaft in the middle of a lawn. Loc-tite, whatever you want, it still moves around and I spend 30 minutes burning the heck out of myself trying to just get moving again. I saw this hydro thing and almost fell out of my chair. Let me know if I am dreaming!