Vacuum slide cleaner for 2" x 2" slides

I have recently started going through some of my dad's old slides from his tour in the Navy in the late 60s. My intent was to scan and color-correct the slides, but 45 years in storage has left the slides covered in a large amount of dust. I'd rather not wipe the dust off and risk scratching or damaging the slides, because there is already enough cleanup work to do. So, i came up with this vacuum cleaning device.

The base holds 20 slides, and the top is designed for the 1.25 inch hose from a