Does something like this works for you?

https://drive.google.com/file/d/15lq4Fz3rzJdIM7iXbC3JB79-IPjsTIzY/view?usp=sharing

I just imported the 2 stls in blender put them together, like in the same place as you wanted

Selected both as seen in the image, then File -> export -> STL. Make sure you have “selection only”.

Export it, open it in your favorite slicer, and that should work.

Blender can do a lot, I use it to design and modify a lot of things from thingiverse too, and I have learned a lot of tricks on blender too.

I also want to learn freecad to do stuff from scratch, but in the meantime blender does what I need.

EDIT: Most probably I did not understand the requirement correctly, is this supposed to have a hole? hit me up if you want, happy to help https://discord.com/users/poringo#6290

Another Edit: Oh something like this?

I’ve been using 0.6 for some time, I normally do functional prints. It is a good compromise between speed and quality.

Is the glass bed magnetic too? How did it get stuck? Can’t you just pull it? Sorry I don’t quite understand xD

Reminds me when I did not fastened my glass bed, it crashed down from like a meter and a half. Good thing it only chipped a corner.

Thanks! It does not show, but this is one of the 3 colored filaments, so it looks different color depending on the angle you look at it.