I was about to say, I've taken the Gimson gearbox apart on the poorly motor and I think I might be able to use the existing shaft (if I can bore out the pinion gear to 8mm) and lose a single stage of the gearbox. Once that is done, the extended shaft fits in the gearbox with the adapter plate to the 775 motor only needing a little bore out to make it fit onto the motor.
My next engineering challenge then :P
Do you mean the brushless motor I am using?according to hobbyking it says it 8mm.
Also, I can't count, it is a 18 tooth gear, not a 9. In which case, according to gearsandsprockets.co.uk, I can get a MOD 1 18T to fit on a 8mm shaft. It definitely is promising though.
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