The Legio Overlay Pack from Noise Engineering makes it easy to change the panel labelling by simply applying an overlay; no mechanical panel change by disassembly is necessary. The modules in the Legio series can be operated with alternative firmware, so it is not absolutely necessary to buy all the modules if you only want to test the other features once. So if you change the firmware frequently and always need the correct labels on the module, you can hardly avoid Overlay Pack .