jurden,
Glad to hear they treated you good. On the valve thing. Did you ever do a valve flow test your self, like hooking the valve up and putting the hyd hose in a bucket and seeing how many GPM was actually flowing out the lines. Your tractor is only producing 17 GPM at max rpm. At idle, it is only pumping several GPM. There are some fittings that are built with restrictors, have you checked to make sure you have unrestricted fitting.