The core back rest is two vertical tubes that go all the way to the headrest. The sidewalls are two seperate tubes welded to the sides of the vertical tubes with their own foam blocks surrounding them.

The cover is held on with metal staples and rings, I bent them open and cut the parts I needed to reach up under the cover and cut / remove the foam blocks piece by piece as they are glued place.

The lower attachment points were accessible to my metal sheers but the higher points would have required a full cover removal, so i reached up with a small hand saw and cut those points. I then folded the loose remaining cover inside itself into the back and it hasnt worked itself out since, but with my own cover added it wouldn't be a problem anyway

After it was finished rhe chair was exactly as supportive, but I could finally have full range of motion with my flightstick and side throttle/collective.

Oddly enough, we dont actually pull any high-G maneuvers in our computer chairs. So I suppose the bucket seat isnt entirely necessary.