this gear will allow you to turn accurate metric gears on a 7x mini lathe.
It will require an alternate banjo arrangement which i have included photos of and will add drawings or cad files once more testing is complete.
It also provides finer feed, 0.0025(406 tuns/inch) vs 0.0039(256 TPI) with the default 20-80/20-80. And my new banjo is simpler to adjust.
vidio at http://youtu.be/kc-2b6fv8Hk
Is this is a worthy solution to a real problem?
If you look at my banjo (please ignore the video production quality.) it is easier to adjust even if you don't use the big gear for production.
Would there be enough community interest to justify writing up complete plans and making a better video?
I have been using this gear for a while now, even the prototype I printed at lower infill has held up well.