Summary

Various angled stands for the Elecom Deft (not the Deft Pro) trackball. I've also included one flat "platform" model so you can customize your angle (this is as easy as sinking part of the model through the floor in most slicers).
You may think you need to print this in fine detail to even out the slanted top surface, but there's really no reason to - the trackball's gonna cover it. I printed all my test pieces at .24mm layer height and they fit fine.

Thanks to tigerflip for uploading the original Deft Pro model and posting the .step that became the basis for this upload.