I'm seeing the very same problem. Could it be a bad pot as well? My kit appears to be working now, but the decay knob does nothing at all to the sound, accented or not.
What is the part number for the Decay pot?
Also, I managed to melt the top of one of my tact switches while desoldering IC7 (it was in backwards
) - not the button cap, just the switch itself. I've melted it back into shape with a hotknife, but I think if I'm going to order a new decay pot anyway, I might as well get a new tact switch while I'm at it. What's the part number for the tact switches?