Replace obsolete Hardi Pilot Controller with economical Farmscan Pilot Controller (max. 3 sections).  Upgrade kit includes Jackal Controller, Mounting Bracket, Tractor Loom (5m), Sprayer Loom (5m) and Valve Interfaces.  No need to replace valves or flow/wheel sensors provided they are in good working order.  Jackal performs all the same functions as the complete Pilot system, all from single control panel.