Ready to begin cage building here soon. My car is allowed to use 1.5" x .095" tubing. Can I (or should I) use 1.5" x .120" for the main hoop? Does the entire cage need to be the same size tubing? Does there need to be an observation hole drilled in each tube?

Is the "high density" padding required on cages this year, or just the "normal" tube padding?

I'm going with an aluminum seat. Does the seat back brace mount to the seat and the cage? Someone told me the brace cannot touch the seat itself, but instead is just a "backstop" to keep the driver protected in a rear-end contact.

Will I need an equivalent passenger seat for driver's school?




I keep perusing the GCR online, but my local club doesn't have any hard copies yet.

Thanks!

P.S. Maybe that's actually five questions.