Active feedbacker: schematic check

[drdn0]

Howdy,

Been noodling through this active feedbacker for a while. There's some stuff not shown (ie. the 'bypass' switch, which just interrupts the return>send loop, turning the entire thing into a buffered effects loop pedal - I'm assuming just opening the circuit up after R19 will work) and another switch doing basically the same thing after R22 to turn off the noisy feedback loop. Actually, in all honesty, I'm not 100% sure what that last little loop will do but I'm assuming feeding the output back into the input of the summing amplifier after a buffer could make a bunch of interesting noises.

Is there anything obvious I'm missing? Entire thing will be run off a bipolar supply.

[drdn0]

FWIW, I don't expect a full circuit breakdown - just if I've missed anything totally obvious (which I have a habit of doing)