Modding a Vintage Maxon D&S II for true Bypass.

[StoneRose]

Hey guys looking for advice for how to wire this pedal for true bypass.
No buffers to deal with only needing to rewire the switch.
I was struggling to find a schematic for this which is the same circuit as the Ibanez od855/overdrive II (narrow box) i think the one I have included is the right one minus the LED etc.
Can the switch be kept or will I need to use a 3pdt switch?
Thanks