Way to go they are a great car, the fuel smell issue is fairly common and from what I have studied on here it is nothing to worry about unless there is an actual leak, I get it in mine, The flat spot could be a number of things, tune, sparkies, coils, dirty injectors, fuel pump and I'm sure there are more, with 30k spent on it only complicates the analysis, so, as mad082 said, list them all up if you can.