I am going to a field trip in a few days. I need a case to to make it safe to operate on site. So I designed this. It is a quick dirty prototype. I used really thin walls to make it print fast and save material. The result turns out fine. All parts fit in just one print:). I thought somebody might interested so I am sharing my design here: mppt2420hc case
You might need change the wall thickness if you want it more robust. If you use different inductor and oled, you might also need change the cover opening. I found although 0.96 inch ssd1306 oled all looks similar, the dimension has slight difference. You might want to measure your display and modify display cover accordingly.