My Official GTM Build Thread!

[beeman]

The great thing about the GTM - build it how you want it!
Just remember that FFR used CAD and FEA to design the chassis for rigidity. The center backbone gives the chassis rigidity in the region of the door openings since there are no full length door bars. I doubt you would even notice changes in chassis rigidity after modifying the backbone in a street car with the roof structure intact. I modified my roof structure so I added beefy door bars...

I ended up buying a windshield vent kit from Summit, it has pretty nice black plastic vents.

https://www.summitracing.com/parts/sum-991104-2

[LCD Gauges]

I doubt you would even notice changes in chassis rigidity after modifying the backbone in a street car with the roof structure intact.

Actually, I did notice a bit of a 'buckle' with only one bar cut.
The chassis is also supported by the hoist at the insides of
the wheel wells where the footwell and fuel tanks meet.

I'd imagine it would be worse with weight on wheels.

It makes me want to extend the bar to the HVAC enclosure
and build an 'x' bar in between.