Putting it all together

I returned the egg trays to the incubator (they have been out of it since we brought it home) and suddenly the remaining spare parts all made sense.

The long skinny pieces were dividers for the egg trays

The weird piece with the holes drilled in it is the lock to keep the egg trays in place as the drum tips forward. It also has the remains of a sticker that says 'DO NOT DESTROY' so I figured it must be something important!

So now I can see it all assembled, and it really looks like everything is all there.

Even the holes on the bottom door, which I thought were fixed shut...

Are actually cleverly hinged little sliders for ventilation.

I have determined that the timer is not working, though I have located a replacement for about $100 - as soon as I have that kind of money to spend on this little project. I can still push the on/off button to make the drum rotate. So here's a demonstration: