Neutrino Clipping Options - Symmetrical / Asymmetrical

[PhiloB]

Building one of these for a buddy and he wants to the option of switching between sym/asym clipping.  Is there a better way to do it than this?
Thinking of putting the diode in a socket, soldering wires to the diode and putting the other diode on a SPST switch.

[PhiloB]

Wait, I put these in parallel.  The document says series.  So, I'd need a dpdt?  Putting the diodes wire to wire across one pole (2 diodes) and one diode on the other pole?