I have some heirloom photos. They are glass stereo slides. There are various sizes. Most are close to 120 size, but not necessarily exactly that size, and there are also some considerably smaller ones as well. I am trying to figure out how to scan them with an Epson V750 scanner. It is the mechanical/optical part I am trying to work out. I did make a "film" holder out of glued up pieces of thick art paper, but only with partial success. I got the elevation above the scanner glass pretty much optimized by trial, so I know about that issue. However, the holder wasn't quite flat, and after I made one to fit one of the slides it ended up being the wrong size for some of the other slides. Are there some commercially available holders that might work, perhaps the ones from better scanning? Keep in mind that the slides vary in size, and also they are thick (typically about 1.3mm), so the holders would need to accommodate those constraints, i.e. it should be adjustable for size and be able to handle thick materials. Also, there are a lot of fingerprints and dust on the slides, and I would like to clean them, but I fear damaging the images. Are there any suggestions on how to handle cleaning, or would it just be better to leave them as-is? Thanks.