Consider checking out the Tuning Forum, there may be a tune comparable to yours with enough differences to make it much more user-friendly. Failing that, you can request a tune from one of the more prevalent posters that hasn't tuned one yet.
i did a tune for this car before and it was a good one.so i think when i get home,i think i gonna make the tune again because the other tune i made was for a friend
i tuned my trans so that the top speed was somewere around 400mph,then shortened 5 and 6,combined with beefing up the suspension it helped a little bit i dont think i can race it and win with it though.