Right Angle Viewer for D-Bit Grinder

This is a right angle viewer intended to mount on a d-bit grinder to align small drills and to monitor four facet grinding progress. 5X eyepiece, 4X objective. Total optical lenght is approx 140-160mm.
Eyepiece tube is 24mm, objective is 20mm diameter. Prism is 10x10x10mm
The 4 mounting holes are intended for M3 SHCS
Fusion360 file provided so you can adapt as necessary.

For printing, lay the 45° portion flat on the bed, this results in no supports needed.