Son of Ben - Second set of pots

[thesebmeister]

Hi everyone! Long time lurker, first time poster with zero technical knowledge here.
I'm trying to add a secondary set of pots (drive and volume) to a son of ben kit, wired to a footswitch so I can change between two presets while playing (I also need a LED that lights up when preset 2 in engaged). I've read other similar threads but I can't wrap my head around the wiring of the volume pot in this specific case.

I've come up with this so far:

• I need a 4PDT footswitch
• It should be fine to wire the lugs that go to ground together (Drive1 Lug1 with Drive2 Lug1 and Vol1 Lug1 with Vol2 Lug1)
• 2 poles handle Drive Lug2 and Lug3
• 1 pole handles the LED

This leave me with only 1 pole to handle the volume pot. If I connect in parallel Lug3 of the Vol pots and switch only Lug2 will it work as intended?
If I'm understanding this correctly this halves the value of the pots, resulting in less max volume, but still usable (?).

Here there's a messy wiring diagram I made:

Do you guys think this will work? I'm pretty sure I've done several mistakes if you have any tips I'm all ears!
Thanks!

 

[Feral Feline]

Check out post #32 from a thread about switches.

Also, someone (Brett? Jwin? JCPST? can't remember who) wisely told me to put the CLR between the power supply and LED, that way if the LED gets accidentally shorted on the enclosure or other components you won't blow the LED with raw 9v ripping through it.

 

[jwin615]

One option
Tie all legs 1 to ground
Switch both leg 2 and leg 3 on each pot with the switch.
That will occupy all 4.poles but it will work and the pots won't interact with each other. Putting the resistances in parallel won't be fun. When you adjust one, it will impact the other setting.

Another option would be to put them in series. One channel would always be the LOUD channel.
Adjusting the LOUD channel would change the second channel level/setting but adjusting the second channel would not change the first/loud channel.
That could be done with a 3pdt and have room for an LED.

FF, my peeve is to switch the LED ground and keep DC off the switch. But yes, CLR between power and LED would be helpful to limit current in the event of a short.
@Robert these kinds of mods(more than 3 poles switches) come up fairly often. Any chance of getting a dual relay utility board at some point? Maybe one that will mount vertical directly to a carling style spdt to minimize footprint(pretty layout be damned) or a relay +3pdt breakout that would give 4 poles + bicolor LED switching.
Something more elegant that daisychaing current relay boards.