Could do with a re-design I feel, the top cover is weak and tends to break around the area of the buttons nad tricky to print in ABS without warping (not tried PLA which might be better in that respect). I glued two strengthening strips along the inside edges, crude but helps. Importing the STL into SketchUp results in a lot of errors which will take a long time to repair so really need access to the original files. I would make the case a little larger (for strength) include options to remove the SB20 tube vents, and to include a boss or something to accept an XLR socket for attaching remote probes. Might just be easier to start from scratch!