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Hi Stefan,

i am also working on a tool changer in the e3d design. I also will use the kinematic coupling to align the print heads. I found a very cheap, compact and highly precision way to realize the coupling with standard parts.

I already have design the "T-Bar-Spring" mechanism with 3D printed parts. Next is to design the gears for the servo integration.

So if you want to share infos let me know. I will public my design as soon i have it ready.