Semi Breadboard A-B Circuit Switching Design

[PJ03029174]

Hi

I would like to set up a little testing rig where i can duplicate a circuit on a large breadboard and switch between circuits to see which i like best. I've drawn it out to help make it clearer. (im sure theres an easier way to do this but i don't want to manually swap conponents, it has to be as quick as possible and not interfere with the signal too much.

Here is the drawing


I'm a beginner to this so can someone point me in the right direction, the diagram i've drawn requires me to move the input and output cables between circuits. The rear of the box is wired to the breadboard at all times.
The obvious thing is a switch but i was unsure whether i could share grounds etc between circuits? hence why i kept the two circuits completely separate.

[PRR]

> i was unsure whether i could share grounds etc between circuits?

Usually you can. (In your full stage-rig, all the grounds are connected.) There are some setups which will make trouble; often this means they won't play well off the breadboard either.

> The obvious thing is a switch

A "bypass" switch. Except.... there's a jumper to carry the signal straight-through for "bypass". Omit that and run those wires to your second effect in/out. So instead of effect-no/effect, it is effect-A/effect-B.