ClockworkPi DevTerm - FieldOps Cover Remix

This is a remix of https://github.com/philosiraptor/devtermfieldops- made by Philosiraptor. The original design is good but has some issue, like the holes for the USB connectors too narrow and also it is difficult to open the thermal printer door on the back of the DevTerm.

I fixed those issue and also I have made a version that include a magnetic dust cover. To mount the cover you need 12 15x4x2mm magnets.