Well I have to say that even without buttons to go with my new lights it still looks sweet, and makes a sort-of cool blue ring around the knob.

Is the transistor number MMBT390DICT-ND (Digikey) been added to the parts list yet?
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Drive fast, Play it loud!!!
20GB Original Blue Lens MKIIa Rio SN 030102760, Blue Buttons.
20GB Original Green Lens MKIIa Rio SN 040103268 Grey Buttons.