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@DaveR Can you tell me how to do this procedure correctly? I think this is producing problems for me.
I am starting here with the basic shape of the circuit board I want to house:
Now, I want there to be 2mm thick walls around the edge of where the board will be:
Of course now, the bottom needs depth so you raise both of these faces up 2mm. But I guess this is incorrect based on the coloring
Now I understand what you said earlier about extruding before outlining the sides of the box, but the problem I am having is, I am starting with the measurements of the item, and attempting to build out from there.
It seems I would need to know the final outside dimensions first, extrude, and then use the offset to bring the line inward to the size of the board.
Attempt 2
This was done by first making the shape of the board and offsetting out by 2mm just like last time.
Then I erased the inside face, the original shape, before extruding up. I then offset in the opposite direction (inward) to get back the original shape outline.
This appears to work but feels inaccurate and wrong.