I have a pretty nice G1 collection and I have a display for all the 84/85 formers. I'm looking at getting a much more open (glass wise) display case and have had a couple concerns with sun already. I think it is mostly my paranoia but a nice jazz did start to yellow in the shoulders/doors. (Now I noticed the jazz after I had taken pics of him and at one point I think he sat under closely lit non-difused CFL lights for at least an hour. I'm not sure if that was the cause or not, probably was. That has been my only bad result of yellowing so it doesn't really argue that I have an issue in my display. One note, the display also never sees direct sun since it's room window is facing the north but does get indirect light. Besides any thoughts on my yellowing so far I'm wondering what others experience and thoughts are on putting UV protection on my new curio. The first estimate I got was $220. That's a huge cost addition and I'm really not sure if it's worth it, especially if it's just to satisfy my paranoia. I'd love some advice. Thanks!