This is an all in one solution for your Logitech MX Ergo. The mouse sits at 45°. It uses the original metal base and is held on with up to 6 10x2mm magnets (you only really need 3) and it's recessed so there's no risk of the base sliding off. The mouse itself is held on with 4 8x2mm magnets that may need to be glued in, just make sure to put them in the proper polarity that's unique to each mouse ( I have 2 MX Egro mice and the 4 magnets in the bottom of each mouse isn't the same so it pushes one mouse off while holding the other on). The distance from the edge of the mouse to the desk is about 2mm.

Print Settings

Rafts:

Yes

Supports:

Yes

Resolution:

0.12

Infill:

+15%

Notes:

I highly suggest printing at 0.12 or lower as the tolerances are quite tight for the base plate.

Here's a link to the magnets I used.

(https://www.amazon.com/TRYMAG-Different-Neodymium-Refrigerator-Whiteboard/dp/B09WZTSQ9Y/)

Don't worry if you happen to glue the magnets in the wrong polarity. The magnets in the mouse aren't glued down but held in place by 2 screws and a metal plate as seen in the last photo. Just take apart the mouse, flip the magnets (each side had 2 square magnets) and resemble.

If you print this with PETG you don't need to use magnets to hold the base as it should also in with some force.