adding true bypass to vintage effects

[Smeero]

I just bought a vintage Ross phaser for 35 bucks! (from a guy in an MTV pop band)

Need advice on adding true bypass to it. It's a DPDT switch. If I accurately ID the in,out, power and ground wires is there any reason I couldn't stick in a 3pdt with the madbean wiring? 

Please share general knowledge,  secrets and potential problems commonly encountered when adding true bypass to vintage effects.

[bigmufffuzzwizz]

I've changed the footswitch in about 5 different muffs and did exactly what you mentioned. Everything worked fine as far as I could tell 

[cjkbug]

I just built one of those from a tonepad layout. that's a nice sounding phaser. conrats.

[slimtriggers]

That's a great deal!

I think I would just make a true bypass looper in a 1590a box and leave the vintage pedal intact as much as possible.