5E3 deluxe circuit in chassis with an extra knob

[terminalgs]

my Hoffman 5E3 circuit is in a chassis with an extra knob hole on the control panel.  Any ideas of what I can do with it?   I don't want to embellish the tone/volume circuit with anything that would suck down the level  (like adding a treb/bass t/s or something)..,  I have some rotary switches I could use ( a 3P2T make-before-break rotary, some 2P6T rotaries,etc) and all kinds of knobs.

I thought of using a 3P2T to switch between the .1 1st coupling caps to .001,  and I thought about a one knob tremolo (ampeg style with a LDR in series with the signal.,  I can add a 12AX7 to get another triode stage....  but a trem with a only a speed knob? (i guess if the LDR was on channel no.2 before the volume knob, and if chan1&2 where chained together, that volume knob would be sort of an intensity knob...

anyhow, before I dream something up,  I thought I'd ask people with more experience.

[firemedic]

Maybe a one-tube reverb w/ no dwell control?

[terminalgs]

that's a good idea,  I don't think my cab has room for a full size tank, tho.

[firemedic]

I got a short tank, I think from tubedepot.com, but check doug's store first. It works great.

[jojokeo]

You can do lots of things like making treb & bass instead of only a tone control is a good one and make it switched to either bypass or ground lift the tone stack. Sounds really good on a 5E3-ish build. But, you can put in a presence pot w/ pp switching to swith out NFB all together, down all the way it's a simple NFB and turned up it's your presence control. You could also make a PPIMV or even possibly a VVR master power output control.

[stingray_65]

VVR

[terminalgs]

this is what I ended up doing.  the 3 switches are ganged together in a 3PDT rotary switch.