I have a 5-Speed PST CF shaft but it's from the first batch made with a 3"diameter. Supposedly they have a new design- made with a 3.25" diameter due to problems people were having with the first batch. I have yet to install it but if you see this Shovel, would PST take my old shaft back and give me one of the newer designs? I guess I could call PST but since I'm in no rush, I thought I'd ask you first.