Gear Box

This is my 2 speed sycromesh gearbox it has 2 gears 1/3 and 1/1, every thing fits snugly inside the casing and is simple to assemble, i am looking at coupling this with my fluid flywheel clutch and using it in a car i am designing. there are not many pieces and this i quite small. i would be careful if you make this not to rev up the motor to much as this might damage the syncros it should work with something like a 9gm servo to change the gears.
plz leave comments if you need help making or