As shown, "Clean Bypass" bypasses nothing, since Drive extra triode always receives signal and itīs output is always connected to next stage through 1M resistor, so you NEED to ground its output or at least have Ry1b select either/or Clean/Boost output.
As is, it only enables/disables Clean but Dirty is always enables (unless you add the second relay set of contacts that is)
EDIT: to see it better, draw the Clean path with green pencil, Boost with a red one, and think which path gets interrupted (or not) when activating relay.
Also, since itīs a new design , and such always require troubleshooting and fine tuning, I suggest you first build it on an eyeletted board or similar, with extra "spare" eyelets all over the place, which allow you to mod things at will.
Only when you are 100% happy with your results you commit to a PCB.
Just as an example, google "Bob Pease lab bench" .
He was a mythical designer ... look at the cabling nightmare his breadboards and whole bench eventually became ... for good reason