Got it!
Moi again fast and efficient :D

to Alexpolo ...where can I download the model that you pictured if available?

I am also looking for something like this https://www.instructables.com/Laser-Cut-3D-Models/

but 123d make is no longer available...I think.
And I think Rhino has something similar.

Can Moi do this? or any other small app?

Thank you!