OK so I posted this on my local club forum and got mixed response so lets open it up to a larger audiance.

Question for Tech Guys
Can you mix the dia and thickness of roll cage material as long as it still meets the minimum spec.?
Reason I ask.
Cage in the car I am prepping is a bit overkill (done by PO)on the tubing but I do not want to start again. 1.75"od x 0.125 wall (GCR allows for 0.095 wall or 1.5"x0.120")

I need to add door bars, a dash bar, aroof cross brace and maybe a petty bar.

Do I need to use the same material size or can I change it to the GCR spec sizes.
Either 1.75" wall 0.095
Or 1.5" wall 0.120

Cheers SteveP