I have built Porsche 911 GT3 RS and applied fixes from community-driven errata by @Didumos69. But I was lacking the visibility into the gearbox. Inspired with the Lamborghini Sián set, I have decided to modify the chassis to make the gearbox visible at the bottom of the car. Moreover, the goal was to not use any additional bricks that are not included in the set.
My modification to expose gearbox can be applied to the original set as well as to the variant with the community-driven errata.
Download PDF instruction