Managed to get hold of a PSI Motorsport Tuning box for my '98 2.5TDi. Unfortunately it came with no operating/fitting instructions and although the kind people at PSI have been helpful with the performance figures they are not that forthcoming with manuals... It was damaged in transit so needs wires re-soldering onto the circuit board which I assume sits between the ECU and car. My soldering isn't up to this but does anyone see any reason not to have it repaired by someone good enough rather than return it to PSI? Then I have a Brown and a Black wire of which I have been told one goes to the battery and one to the pump. I believe inside the box are different settings too (one of which I was advised not to use without a modified air filter and exhaust?) I know adamss24 is a fan of these it's just getting hold of him! Thanks. Mike.