Cheers gareth , once again thanks to everyone for there opinions trust me im learning a lot about a lot of different standalones and PNP options all ive got to do is find what suits me. Steve i know u were sayin thats your not keen on the prospect of having to add hardware or software to a unit to get it to do what another unit will do straight outta the box . I personally like that i can customize the unit as i go and add features as i go . Can i just ask what the problem is with using ballast's to drive high impedience injectors?. You and Gareth both commented on the fact .? Cheers Al