We use the Kirkey Pro Drag on sliders.
I'd imagine you could use the Kirkey adapter to go between the seat and a slider.
It's aluminum and they don't look all the beefy. While I don't think it looks all that strong, I doubt Kirkey would sell it if it wasn't up to the task.
Make sure your seat will be comfortable enough for all your drivers.
We try to run 1.5 hour stints so comfort and support are both factors.
For most racing, 20 minutes is a long time in a car. For us, that's just a warm up. Keep that in mind when a circle tracker or sprint racer talks to you about seats.
For our better drivers, they get more seat time in one stint then they do in a whole SCCA weekend.
We went to the track yesterday and I got some quality passenger seat time. It's a 17" seat and a bit wide for me. I could have used some more side padding to hold me in place. I was feeling it in my sides in one session.
Wish we had a G meter cause it felt like we were pulling a lot of them!
We planned to use the 36 Series Intermediate until we tried it. It just wasn't going to work well with various sized drivers. We've had drivers from 105 - 250+, low 5 footers to tall 6 footers. Our 16" seat has worked pretty well. We have a booster for shorties.
The 47 Series Intermediate Road Race seat from I/O port is quite different from the 36 Series Intermediate seat.
The sides on the 47 Series wrap around less so the backs of your arms are not likely to be rubbing on the rib supports.
Troy
#35 LRE
1973 Datsun 240Z