I am planning to build my own round tube subframe connectors like the ones posted by "Bobby light" in this link. Fox Mustang Sub Frame Connectors ques.... - Page 3 - Yellow Bullet Forums the only thing I am worried about is that my car is my daily driver. And I do not want round tube bulging up my carpet and getting in the way of my feet. anyone else here have round tube subframe connectors that you did yourself? Or have pictures of others that have done it? I am not dead set on through the floor connectors, but I am dead set on using round two over square tube.