I have been working..day and night for the past couple weeks on getting the 3D parts designed and tested out..  I have a number of objects created (as you might see in the gitHub repo), some of which need minor tweaks...  But mostly, progress is coming along pretty well.  

I recently redesigned the mirror mount to have a floating cage that holds the mirror allowing you to adjust each of the 4 screws to fine tune where the mirror is pointing..should help..

I'm working toward keying the tops and bottoms of all the mounts to make for a more secure fit.. 

I also redesigned the 532nm pass filter mount to accommodate the new pass filter I purchased...(sometimes eBay doesn't pan out as well as one would hope..the original I bought was damaged because the seller taped the filter to a plastic bag...ruined the surface..the new one was shipped extremely well in a huge box of its own..)

I also recently tested the sliding tray mechanism with the 3D printed gear and rack for the cuvette tray.. 

 This will allow the cuvette holder to slide out like a cdrom drive tray..  Works great on the MSP430 I tested it with, now I have to move on and put together everything for it to work on the real micro I am using for this...which came yesterday from Mouser... 

It is the ST Nucleo F401RE...one of the many mBed compatible dev boards..

http://mbed.org/platforms/ST-Nucleo-F401RE/  You cannot beat it for $10 from mouser...  I love the mBed platform actually, and yes the online IDE... I'm horrible at data storage and my code is safer in the cloud...and no, I've never run into the site being down, etc..  http://mbed.org/  worth a look.