Very well done. I have tried a prototype of a 8 speed sequential without the modern pieces Lego has released, but it barely fits a 1/10 scaled car.
If instructions for this car are released I would be interested. Or maybe some in deph pics with a parts list. Congrats on the build! 5/5
Edit: I also prefer 1/10 scale as it reduces the partscount significantly when compared to 1/8 scale.