No worries, gotta learn somewhere!
Chain drive...
Deathly Hallows did a chain drive for one of his Featherweights (and did a build diary here) which shows an implementation and I know at least
Forge Master uses a chain for their axe. The trouble is that if you don't have the sprockets lined up right, the chain will come off.
I use spur gears in
Kaizen's axe and for both
Jibril's drive and axe simply because they are easier to get right than a chain. In the Featherweight category,
Satanix uses a spur system that is pretty neat. However, this is all a bit of a muchness. I would personally stick with what you have for the moment and not worry too much about the gearbox.
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