Quation about attach Fisher Price gearbox

[ChrisH]

If you have one of the older FP gearboxes around, the output gear with the internal octogon fits in the current gearbox just fine. Since older gearboxes are readily available, switching the output gears is legal.

[Kilo Foxtrot 7]

this might be late in the build season but try three screws through the orange output into one of the window motor gear flanges with the long end inwards.

BTW: Be very very very careful with the fisher price gearbox it is very powerful, on our first test at full power it swung around in a fraction of a second and almost broke our coachs arm.