Yes, it is only decorative. In the planning stages I wasn't sure of the dimensions of the "switch05" in the store. I wanted a small momentary switch like you see now. I mistakenly ordered "standard switch hole service" not knowing how big the hole was going to be. So I used a brass knurled knob from the hardware store to cover it up. I regretted the stupid mistake at first, but the knob looks very "lightsabery" and just looks like it belongs there. I guess I'll call it, "blade length adjust" or "multi-phase crystal selector."
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