Here she is... the 3rd generation SC-1.
First thing you'll notice is the bigger PCB. Also, lots more additional components, relays, 3 lighted LED push button switches, and a VU meter.
You'll notice there is a front panel installed (kinda like a 500 series preamp). The reason being the faceplate and configuration of the knobs and switches on the SC-1mk3 follow the X12 kit!
So that means, you can install this SC-1mk3 on this same rack.... with an X12 as it's next door neighbor!
I estimate the SC-1mk3 will be ready for sale by mid-July.