Holoprojector Servo and Astropixels Mount (MK4 Dome)

Holoprojector parts to mount servos and Astropixels to MrBaddeley's MK4 R2-D2 Dome.
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updated September 26, 2025

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Worked great. Only complaint is that the shaft is a bit too short. After a few movement the compartment with the pcb starts to rub around the inner frame. I extended it by 6mm and that did the trick.

Thanks !!!

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This is the best described project in whole droid community. Thank you so much for it! Great quality!

@Rosch_4134806 Wow! That is such a nice thing to say. I really appreciate that. I put a lot of effort into the instructions (even though I know some parts may still be confusing) in hopes that it would make assembly more accessible.

This solution is great- just need to find the longer servo screws now

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Thanks for Sharing, printed for all 3 holoprojectors.

How will you do the lens? I was Looking for 37mm Acryl hemispheres but cant find any online.

@Amnesior_1092071 I believe people use different methods in their builds. Like glass or acrylic lenses, and even hobby/craft cabochons. Anyway, that choice was beyond the scope of what I was providing with these parts. Enjoy!

Very happy I stumbled upon this. Thanks for sharing your design!

The friction fit doesn't work so well. I'm going to seal it up with hot glue so I can pull it apart later if I need to. (edited)

Perfect fit in the Mk4 dome. Thank you! (edited)

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Thanks for sharing. I'm 3D-printing the parts now and will be testing them out in a few days time, when the M3 6mm bolts arrive.

These are awesome. Printed up a set this weekend, followed the instructions and had zero issues on my MK4 with my Astropixels. The only thing I'm not sure about with my build is I only had 85A TPU. It might need beefier hinges because of how flexible it is compared to 95A. It will likely be a while before I get to test that though.

This is FANTASTIC! Thank you for designing and sharing. Any chance you would consider sharing as a STEP file? I'd like to make a few tweaks