ABY pedal schematic

[spauldingrules]

Anyone have a good link or plans (or file) for an ABY (amp selector) pedal for running the guitar to 2 amps?  I have seen several variations.  All the ones I've seen are with 2 buttons - anyone have a plan or know of a plan for an ABY switch using one 3 way switch? (like a 2 pickup guitar)?

Thanks!

TS