It's coming right along... I have the outer casing and the wheel itself printable now...  The stepper motor fits perfectly, and the optical encoder fits too..  The filter wheel has nice mounting holes to make the filters removable, etc..and that way you can customize a mounting bracket to fit whatever optics you need without changing the wheel itself..  

Here is the outer casing being printed... 

The front and back with the stepper motor in place...

The inside with the bearings, stepper motor and filter wheel pinion gear...

A closer inside shot of the back...

Here are also a couple nice shots of the case and the front panel as promised!

I think it's actually starting to look pretty good...!

The front panel without the smoked glass cover which has the electrodes for the capactive touch keypad on the right...

Some laser action..... =D