Thanks for the guidance -- I am going to use the valve to control the forward movement of the cutting wheel and intend only to grind one direction. Hopefully I can install the valve within reach of the tractor seat.

I notice sometimes I need to keep my thumb on the joystick button to move laterally and other times it moves continually without keeping my thumb on the button. I'll need to educate myself better on this operation.

Also, I have an SC-25 question for you unrelated to hydraulics. When storing the attachment, are you able to swing it so it balances on the two forward feet and the adjustable stand? Mine seems to want keel over and land on the cutting wheel no matter how I position the horizontal cylinder. thanks again!