The small gear is just the center of the large gear. The gears were ripped out of a motor rotor type box which fortunately i have 3 of. The small one if removed leaves a bore of approx 12mm in the big gear so instead of machining a shaft, i just left the little gear in which has the same bore of 8mm, which is the same as the shaft, other gears in picture and the bearings i bought. Now i know it works, i can find or buy some aluminium plate and cut some permanent fixtures.

Basically the small gear is doing nothing but being the right size bore for the big gear but cost nothing since i already had them.

Might buy some other gears as one unit because the way ive designed it, i can move the plate to accommodate different size gears.

Cheers Skiprat