Customizable mobile device donut stand

This is a customizable device donut/puck stand. In particular, you can increase the size of the cutout to accommodate fatter devices/cases.

It comes in three variations depending on how you want to weigh it down:

- solid donut/puck: just print on high infill
- puck with hole and lid: print the puck, fill the hole with something heavy (ball bearings, salt, sand, pebbles, etc.) and glue on lid
- puck with bridging: print the puck, pause at the right place (the filename lists the height to pause at), fill with something heavy that won't disrupt printing (not sand!), resume printing.

And these in turn come in two variations, with 1x having the original cutouts and 1.5x having 50% larger cutouts.

My own version is a rescue of a prototype failure, but I don't want to spend filament on a new print. I printed it too short and so the base was too weak, and I glued on a plywood disc to correct it. I also went for the bridging version, and I filled it with sand, but that destroye