Hey Chris, Welcome to the LF...in regard to the dust problem, I have found that vacuuming the holders periodically (slides pulled and traps and septums vacuumed) goes a long way to solving the problem. Brushing and blowing helps but sometimes just seems to move dust around. Additionally, I use a conventional plastic trash bag on the inside of my changing bag to reduce the chance of dust originating in the bag transferring to the holders. There are a variety of retouching methods for the negatives with dust spots.