guys, I need to order a drive shaft for my mower, and I am having it made. My 2520 has a 15 spline PTO shaft, can anyone tell me if this is a standard 1 inch shaft, I'd like to order a quick connect coupler for it but cant seem to find out for sure what size it is. Also, if anyone has any ideas where I could order the quick connect coupler I would greatly appriciate it..