[Aren_Hill]

Originally Posted by craigboez

You can always throw away the shaft that came with the gearbox and make you own longer shaft out of some hex stock. We have done this a few times with planetary gearboxes. It will probably involve turning one end round, adding a snap ring groove, and milling some flats. This is very doable with a manual mill and lathe.

VersaPlanetary gearboxes have a spline on the output shaft with much higher torque carrying capability than the flats of other gearbox shafts.
Making your own spline would require a lot of effort