Stage with the spring slide mount (arrow). The back slide support is mounted on dovetail rails allowing it to be positioned for slides of different thicknesses.
Pivot points for the stage and body support pillar. The bar and cotter pin are for the fine focus mechanism.
The mirror is mounted on an articulating arm and gimbal. The mirror is 5.1cm in diameter and has two reflecting surfaces: plane and concave.
Press-fit to the underside of the stage is this three-position aperture (dia=6, 11, and 19mm). The aperture assembly can be removed and the polarizer added.