The third prototype printed successfully.

I had to dissolve support overnight.

The resolution is still pretty terrible, but it'll work. I just have to do a bunch of post processing.

Lots of sanding:

More sanding of the interior surfaces needs to be done.

I need to buy wire of the correct gauge and quality, superglue and I need to print off the lens templates (forgot again while I was at work!)

Then I can assemble the model.