The kart stuff was so much fun! My first was a Fox Flex with a 90 Mac, the last was a Margay lay down with twin Comet B Bombs! Funny how this thread came up, I recently ran across a guy who has a Margay frame and (as he says it) about 3 1/2 Mac 101's that he would sell or trade. Yeah, I'm old but I do have to make the 300 mile trek to look it over sometime this summer!