Michelson Interferometer

One of my trauma-driven development masterpieces. It has a 13 calibrating screws! (3 for each of two front-face mirror planes, 3 for laser plane, 3 for beamsplitter plane and last one for beamsplitter rotation). So it's very hard and (not so) fun to calibrate this interferometer. And it's very-very sensitive to literally any vibrations around itself. But working!

BOM:
45x d=3mm bearing balls;
18x M3x5x5mm heatset inserts;
1x M3 nut;
13x D=4.5mm L=10mm d=0.4mm spings (or any other compatible);
15x NFE 27-619 washers;
15x D=5.1mm L=9mm d=3.5mm bushings (optional);
16x M3x20 DIN965 Torx (or any other ISO 10642) screws;
Silicone grease;
1x M52x0.75 lens filter base (optional);
1x K9 (or any other optical or not so) glass 20x20x20 beamsplitter;
2x 20x20 front-face mirrors;
1x 100mW (may be less powerful) red (or any other color) laser in similar casing as mine.

Build:
1. Print **lower_base**, **lower_bushing**, **cube_turntable** and **table_bushing_nut**. Insert heatsets, grease bearing