From what i've read EA don't have a fantastic following on this site mate, there have been quite a few cars go wrong/bang with the conversions, thats not too say every one they do, does...

I think your first port of call should be EA and tell them the problems you have, and also the shortgivings you have with the conversion ie: the Actuator, Dump valve etc.

Also I Personally wouldn't mention the fact you've asked for advice on here, as I get the idea they don't rate the comments on this site that highly due what I said above.