Hello Karl,
Love this simple and well fitting design. I wanted to share an issue I had with the spring definition, so in this way share with other users as well.
The description says 6.5/7 mm spring, which proved to be too small. But the ones on the ebay link where I also ordered (8 mm) are also too small. see below the pic, it is not free to move.
So i think there is a different definition where some take the inner diameter (yes 8 mm is the required inner) but websites sell with the outer diameter. In that case 9.5 mm outer diameter is needed. I did find that one in the "full box with all kinds of springs" that Karl also suggested to buy from Amazon so now all works fine.
Happy building !

I will check again. Thanks for the answer. And there is never an urgency 😄 so take your time. I don’t even understand how you can do all you do in 24 hours per day😅.
And the final answer, I think you may have the shaft in the wrong orientation. As in the triangle can go in 1 of 3 ways. However, the CAD files are included in this design. Please check your download and open the PDF to source the CAD files directly.
A massive thank you for the feedback, and it's always welcome, good or bad. It just takes time for me to answer everyone currently.
Kind regards, Karl
Part guide also changed to reflect this
Hello Gunter Van Deun,
I have ammended the build guide to reflect the spring size. Thank you
Hello again,
I don't know if it is because printer settings, but I tried various settings and attempts :
The alignment with the switch and the shaft/button position is not 100% in line. So when turning right to continuous it sometimes slides back in the hole to Norm, but the switch still is in Continuous mode.
I modified the hole in the RSW Back plate to fix the switch and found that moving it about 12 degrees rectifies my problem.
I have been searching for the fusion file, but only have it for the solenoid version. I am not skilled to modify the imported STL from the servo set in Fusion (tried but no clue how to get from mesh to editable solid). Would it be possible to get the Fusion file for the servo starter switch please ?