2 effects, 1 box, 3 switches HELP

[insomniac2295]

So, my friend shot a pedal idea at me. I'm basically putting a Slambox and a Glitterattii in the same box. He wants individual bypass for each effect, and also a master bypass (so one could turn both effects on without affecting the clean signal and then kick them both on without having to stomp 2 switches).

I've seen drawings for how to wire two effects together, but how should I do it with 3 switches? Thanks!

[jkokura]

Have the 3rd switch bypass both of the others...

Jacob