Just finished the SLO, had problems getting some of the wires through the eyelets because of the size. Overdrive channel is working fine but when I switch to normal the volume is very low. Both pots maxed and hardly getting any signal traced all the signal chain everything looks ok. Bypassed the crunch/clean switching and went directly onto the grid of V1B but still nothing, voltages are ok. Swapped valves still nothing, any ideas? Also I take it that the Aux 6.3v tap the center tap should not be grounded? Also the standby switch pops