I neglected to mention that the first batch is only for MK2As.
You could also offer a service to swap out the Mk2 rotary encoder for the Mk2a rotary encoder, so that folks with the Mk2s could get a quadruple-whammy of an upgrade: Light kit, clear buttons, new (not worn-out) encoder, and new (quieter click) type of encoder...
_________________________
Tony Fabris