@colin
I am new at this obviously. I beefed up the bottom portion of the model thinking it would be more stable to make such high walls that lack supporting structures. Perhaps I went overboard with the thickness.
I intend to use this as a concrete mold for making dumbbells and there would be a separately printed top lid (2 halves of a lid) to maintain centerness for the bar during curing.
So maybe it would print fine being as thin at the bottom as it is at the top and then my lid system would also maintain rigidity for the walls to support the weight of concrete without sagging. I have no idea as I havent even used pla yet. Just wingin it…