I am planning a build and have considered adding two channels but i don’t think i need two full channels with completely separate preamps sections, tone stacks etc. I was thinking just one preamp circuit but be able to switch between two volume settings. I really like the Hoffman version with the power supply board and separate relay boards. He provides really clear instructions! Is there any reason why not to simply relay between two volume pots? Would it be reasonably quiet and not pop when switching? Looks like one side of the relay would switch between the inputs of the pots and one side would switch the wiper outputs. It would take two relays to switch both the volume and MV. The MV is a simple volume pot before the PI. Any advice or tips from experience would be greatly appreciated!