Did you find any cost from Tubo Fit?
Selling the N/A and getting a TT is an option, but after all the hassle of selling, trying to get a good price, paying the extra, and then sorting out all the little bits on the new car that need fixing.....which has taken me 5 months on my car and I still need to get an aircon re-gas! It will prob work out the same as pulling my lump out and droping a TT in.
I will say that it there was nothing really wrong with my car when I bought it. Just the odd dash light not working, speedo and odo conversion, stereo changing, dash painting, boot rubbers, gps fitting, dvd fitting, creaking bush replacement etc.....just things to make the car my own, and the odd wear and tear fix.