Two shortlists for a 6ft 3in driver with a 38in waist putting FIA seats in a stripped Bertone X1/9: three seats sized for the driver, three sized for the car, every maker dimension drawing, and the shoulder and wingspan measurement that decides it.

Two shortlists for a 6ft 3in driver with a 38in waist putting FIA seats in a stripped Bertone X1/9: three seats sized for the driver, three sized for the car, every maker dimension drawing, and the shoulder and wingspan measurement that decides it.

Subframe, runner, side mount, base mount: the words that stall more seat orders than price does. The full fitting stack explained in order, with the three bolt patterns drawn to scale and the parts that bridge between brands.

A bucket seat on direct fit side mounts sits as low as an E46 will physically allow. Here are the two ways a seat mounts in an E46, what each one does to your driving position, and what both builds cost per side.

A customer asked whether we do roll cages for his 1976 Morgan 4/4 two seater. We do. Here is the full Safety Devices Morgan range, what the bar numbers mean, why a two seat 4/4 needs its chassis number checking, and what the diagonal changes.

A customer with a classic Ford asked us to choose between the Sparco GT and the Cobra Le Mans. Heights, measurements, trim, the sliders we fit under each, and frame compatibility for a classic shell, talked through the way we did it across the counter.