And then this shit happened...
Off to the cage builder it goes. 2/3 of the rear bulkhead to be removed and cage being welded. I went with this design.
Gotta love designing shit at the bar.
Car is at the cage builders now, using CROMOLY 25CRMO4 45x2.5mm for the material. Bit more expensive than carbon steel, but easier to work with and lighter.
I went with this design as it's a basic cage, and can add to it later if needed. We designed it to J sheduale from the cams handbook, so should qualify for meets in Oz. (Still track car only, but will easily be modified if racing is required)
Youll no doubt note that the diagram misses the bar below the windscreen, but will in fact be welded to the bar that's already there.