Hello, I have been following this thread for a while now and I am very impressed by everyone's contributions, Especially for tackling the problems with all the friction in the original gearbox, great job on that guys (you know who you are)!
I am also very found of the easy to apply mods such as choxs door locks, openable rear cover and openable glove compartment, I applied some of these myself aswell and removed alot of friction by rebuilding it from scratch.
One Idea I had was to make some room for the first gear that connects on the same axis as the rear differential to make that gear able to slide on the axis so it enables you to slide the gear of to the side to dis-engage the gearbox completely for Increased playability whenever you like to. Love your design SamuelYsc.
Here are some images of my Chrome Bugatti, Rims are ordered from AliExpress and slightly modified with a dremel to enable them to connect to the hubs of the Bugatti since they are originally designed for the Porsche. I chromed it using Aluminium Tape, cose be about a dollar in total and was easy to work with. Also I should add it took about 20 hours to tape all the parts. (I'm not planning on ever re-use the parts in another build than this.)
I would also like to recommend to switch the blue friction pins on picture 5 (down below) to shorter black pins in page 6 on both sides, this enables you to open up the rear to access the engine and back suspension, super easy mod and gives alot of interaction-value to the model.