Does anyone have experience with these? BTW, I'm not selling them, I was simply searching for archiving stuff and came across them. They are supposed to protect from oxidation/ pollutants and mold. I am going to archive some DVD's. I've got cases on order, will control temp. and humidity as best I can, store vertically and use high quality disks. Now I'm trying to determine if these inserts or aything else (Protective seal) are necessary for best results?