JohnK had made a layout for the 903 awhile ago, and since I did a layout for the 901 i thought I’d see if I could make a smaller layout for the 903 to make it easier to put this in a 1590BB with plenty of room. I took his
switch wiring to make it true bypass, and removed the additional LED to
tell you that it’s got power, which I feel is unnecessary. Schematic can
be found on Revolutiondeux.
