I may need to make some dark-slides for some 8x10 holders I bought that arrived damaged. I have searched the forum and online and have found the following as possible materials, both available from McMaster. Material #1 is Deldrin and material #2 is garolite. Garolite comes in two possibilities, one is electrically insulating and the other is electrically conductive (for 3-4x the price of the insulating). Anyone have any experience with any of these as far as ease of cutting and feasibility in use. If Garolite- is the electrically conductive worth 3-4x the price as far as keeping dust issues with the holders to a minimum? Any experience/advice is appreciated-thx