Kinematic Mirror Mount for Optics

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You will need to print the following parts: 3 pieces of M4 Hex Socket Spring Ball Plunger, 20mm long. You can find these on Aliexpress at this link: http://aliexpress.com/item/100PCS-M3-M4-M5-Hex-Socket-Spring-Ball-Plunger-Set-Screw-length-6mm-to-20mm/32788274338.html. Additionally, you will need 2 pieces of 0.4 x 10 mm stainless steel coil extension springs with a hook. These can be found on Aliexpress at this link: https://aliexpress.com/item/20pcs-0-3-4-60mm-Stainless-Steel-304-Small-coil-extension-spring-with-hook/32570564544.html. Finally, you will need 5 pieces of M4 x 5 mm copper inserts injection nuts. These can be found on Aliexpress at this link: https://ru.aliexpress.com/item/200PCS-M4-4-5-MM-Copper-inserts-Injection-nut-embedded-parts-copper-knurl-nut/32620856472.html