Dave,
Awesome work!! Love to acquire it when available.
Also, here's a suggestion on the rotary switch being linear, ( from off to 1200 ma ) I think it is better to have dual direction functionality.
Current switch setting: OFF, 4, 42, 140, 400, 900, 1200mA
Suggested switch setting: 270, 140, 42, 4, Off, 400, 900, 1200mA
From Center OFF position, turn clock wise, one will instantly get 400mA, 900,mA, and 1200mA, and Turn the opposite direction, it will start out from the weakest to progressive bright. This way, one do not have to rotate 5 or 6 clicks each and every time before reaching 900mA and 1200mA ( The most used brightness) from the Off position. If the user wants the very dim, it is just one LEFT click away from the Center Off position.
Ray