just wondering guys, are the gt advance rarer than a normal gt turbo? if so whats the extras or differnce? now insurance, this is a touchy question , just what is straightened out for me. if i buy a gt thats registered as a non turbo for years and years, and i leve it as is, is this illegal? how do i change the above just a call to dvlni? thanks alot guys sorry for being stupid.