Joe, got it, you had me worried for a short while. I remember when the "dual mono" boards came out that several builders were keeping the two channels separate as much as possible, not sharing the floating ground at the RCAs.
Are there any any just perceptible advantages or disadvantages at all when using the plate? Thinking building may be easier with the plate rather than those slip on grounding tab washers. Could wire the RCAs and plate right on the bench and drop it into the chassis.
