Treasure Chest

Fitting:

I recommend printing the "medium" version. If you really trust your printer with tolerance then go for "tight" since it will be more sturdy.

Supports:

For the top part, if you are comfortable with the overhangs, you do not need to use support. However, I highly recommend using tree supports as shown in the picture.
For the bottom part, you only need to use custom supports for the key inlet as shown in the picture (make sure bridging is on), or you could just use supports for all the edges for a cleaner result.

Notes:
The ring stand is 59.5x34.5, in case you want to customize your own.
I printed all the parts at 0.2 and 15% infill.

Happy printing!