Vic I hope you can help me out. I installed a extra valve kit for my B7510 it is installed and works great but I would like to get one more valve. How can I get a part # for just the valve. This is a stack valve set up so I should just beable to add just the valve but no one can get me just the spool valve. Could you please Email with any info. Heres my email Kens914@ymail.com