I got this idea off of another STL driver at the last race at Palm Beach; it's easy to take out of the car if need be, weight can be added/removed quickly. It is 1/4" thick steel plate in the center, 1/8" thick steel beams on either side that mount directly to the stock seat track locations, and a steel Gold's Gym threaded dumbell handle welded to the 1/4" thick steel base plate. I will be using barbel weight plates, and right now I'm about 85lbs under weight, so I've got a few plates to add. The next step is to drill a hole through the threaded center section after I have the weights on in order to put a cotter pin through it so the nut can't back out. I'm also planning on having it powdercoated next.

What do you all think about this? I liked this idea a lot better than drilling a bunch of holes into the car, and I can easily add and remove weight as I modify the car.