Hi, I decided to upgrade the auto feed unit on my chipper to one with reverse mode, I chose to put in an 'Autofeed Plus' unit ,it is working good except when it is programed to reverse the hydraulic hoses tense up and the rollers do not reverse. Everything works fine manualy, I live in a small town and no one here really knows any thing about chippers, I have attached a drawing of the hydraulic system (minus the winch and lift/crush) I drew it myself so it isnt perfect. If anyone has any ideas please let me know thanks Kano.