I met the owner of renntech last Wednesday at the track, he wants me to bring my car by his shop so that he can show all his mechanics.he was very impressed,,He hung around my car for a long time, and every time I ran( only got in three runs )he would come over and congratulate me,, he seemed to be impressed. we'll see, i am going by his shop next week it is 1/2hour north of me.