Yes, for some reason whenever I take my car to the Ring, when I get home the car starts miss-behaving, as in the boost doesn't hold, keeps tailing off under full load then pulling hard, tailing off and so on. Must be the ragging round the track + long distance driving?! Last time I simply cleared the fault code and reset the Bluefin and it was fine again, infact it felt like a completely different car, pulled ALOT harder. After this years trip (2 weeks ago) there was no fault code and the car has only just started playing up. Will reset the Bluefin later to hopefully cure it. For some reason though, when ever I reset it my car runs like a bag of shit for a while, won't idle + miss's until on boost, eventually sorts itself out, very strange. I have heard that an Apexi Boost controller will solve this problem as the standard boost control unit isn't too great. Glad to hear I'm not the only one with this problem!