MX Ergo 40° Stand with Ejector Button

thingiverse

This is a remix of Alpha3_0's excellent 40° stand for the MX Ergo. I've been thinking about how to add a button to eject the MX Ergo's trackball for cleaning, and this model provided the perfect base to do just that. I swapped in 8x3mm magnets (because I already had some) and removed the underside slots for the ball pusher and the USB dongle. I also made a version that doesn't have sockets on the bottom, in case you just want to use rubber feet. My 8x3 magnets actually measure 7.9x2.7mm, and the sockets are very tight. You might need to scrape them out a bit with a hobby knife, but I figure that's better than having to glue them in. You'll need four magnets to hold the trackball, and another six to attach the metal plate to the bottom. Before you install the magnets, check that they're oriented to match the polarity of your MX Ergo's base! Once you get them in, they're very difficult to get out. I learned this the hard way when I bought a second MX Ergo and discovered that its magnets are installed differently from my original one. UPDATE: I've added a model that has the original storage space for the USB dongle. I found that it was too tight when I first printed the model (which is partly why I removed it), so you might need to scrape it out a little to get the USB dongle to fit.