1:10 or 1:12 scale project wanted...

[glassdoctor]

Would be nice to replace the whole thing with a slipper diff with standard 48 or 32p gears. But I don't know one that would work at the moment :)

I think I would do the piggyback gear... with a 46t gear so you can line up the teeth perfectly and drill holes to bolt them together. It would look interesting but it would work great.