I will check out the video. Thanks for mentioning it. In fact, that might be just what I need. Chromix has a ton of these (still?), and they suggested that I take it apart and examine it. But, I was reluctant to do this on my own. But with a video as a guide, it might work out just fine.
To answer your question, it's $1,200 or $1,300 to completely review and upgrade both units. Maybe it's gone up since I last checked? At the same time, for that price, they would also calibrate the Spectrolino. So, it could be worth it.
It's certainly worth keeping this setup. It's one of the few spectrophotometer that can be used both normally and in a UV mode. As far as I know, it's the only spectrophotometer with a polarizing filter. I've heard from both Colorburst and Chomix that a polarizing filter can be very useful with matte papers.