Well, I found myself with 'too much free time' again last weekend, and I wasn't too happy with my original design. The uprights for the steering wheel were too close to the seat, making entry and exit a tad difficult. I still had some leftover tubing, so I cut the uprights off and relocated them.
I also replaced the chair base. As I posted above, I had scavenged it from a busted chair from work. Well, the chair base was the reason it was in the 'scrap pile'. I acquired a second busted chair after making sure that the base itself was in good condition. Take a look at Racing Chair 1.2