I have a Spector Euro 5 and I'm about to swap in some Nordstrand Big singles and a Darkglass Tone Capsule. I need to swap in a stacked pot (for the low/high mids) in place of the seperate pots it comes with. I would also like to use a push/pull pot for the volume (active/passive) and will need a blend pot. Any recommendations ? I believe I need a 50k pot for the EQ and 250 or 500k for the volume and blend ?