Seat Fit Issues
The Sparco Circuit Pro seats I had ordered ended up being too short — my shoulders hit the head protection halo even if I slouched (I’m 6′3, 215 lbs). I learned a good lesson that a seat is like a helmet — you’ve got to try it on before you buy it. I ended up selling the seats to another track junkie, and getting a pair of Recaro SPG XL seats from a friend who had them in his personal inventory (i.e. taking up space).
I was a little concerned if the seats would fit in a tiny Miata. I’ve seen normal (not XL) head-protection seats installed in an SM. A trip over to TC Design eased my nerves. Tony took one look at the seat in the car, and said it would be absolutely no problem getting it in there. He was mostly concerned about the width of the seat base, but that’s an easy fit with more than an inch to spare all around.