Converted the Solidworks to see if it would be printable by a DIY printer. The size is 500x500 if you rotate it 45 degrees which won't fit on most DIY printers. Yet another reason for me to build a Large Format Printer. I thought it was an interesting shape so I decided to make it a derivative.

If you are going to use this for a tree stand you'll need to add some type of support bolts. The OP said that some blind nuts are added during the molding process. IGES and STEP included for those that would like to edit.