OK, Im persevering with DB interface, Id overcome previous probs by powering direct from batts instead of thru the PRO 120s. Have now upgraded to 24V HP solenoid valves for the HP ram firing & exhaust valves, but.... when either of the valves closes (ie disconnects from the shared 24V to DB interface)it cuts out the DB interface momentarily. Ive tried adding a direct +24V to the DB but still the same. Any ideas would be much appreciated ...

Tel