pedal switcher

right, if i wanted to build a stompbox that let me switch the order of my pedals, anyone got any suggestions for how to go about it?
i'm asking as I'm playing around with synth pedals and currently have a zoom b2 producing a loop that goes into a synth pedal for ambient background stuff. i'd like to be able to put the b2 *after* the synth pedal every now and again so I could put trem/vibrator on the synth effect for a d&b type of noise - rather than manually replugging mid set I thought a foot pedal'd do this.
Anyone tried this before and have any advice?

 

that's great: 2 mins after posting the question, there's the schematic. I am raising a beer to you, my friend!