I have exhausted my knowledge of TinkerCad, SketchUp, and 3ds Max. Here is what I am trying to design.
Top half of a sphere with dimensions - 60mm x 60mm x 10mm
2mm wall thickness
30mm opening at the top
Inset ring at the bottom opening with diameter of 59mm x 3mm x 3mm.
Something like the attached image but true circular.
Can this actually be done?