This is a much needed improvement for my previous design for the Toradex Viola Plus Case. The detachable panels are easier to detach, the case is more robust, the peripheral holes are tighter and the opening for the SDCard is more accessible. You have both the STLs and the source FreeCAD files here. In case you are interested, this was my previous design: https://www.youmagine.com/designs/toradex-viola-plus-case