Very cool. Didn't know they shipped their own. We didn't receive any with the one our school bought, unfortunately.
Can you adjust the height the same as with the positive film mounts?
The height is not adjustable, the glass is optical quality. The end of the tray is notched as is the film area guide which instructs the scanner to focus on the glass surface.
The notch on the film holders are different (smaller) instructing the scanner to focus above the glass surface.