Any schematics/layouts available for a Rangemaster-type pedal . . .

[msb69]

. . . with a selector for treble boost, mid boost, and full range boost?

[jrc4558]

Check out Brian may treble booster at tonepad. use common knowledge to turn it into bid boost (read:search forum)

[MartyB]

Here's my version:

http://aronnelson.com/gallery/MartyBs/r3pcblyt

http://aronnelson.com/gallery/MartyBs/rgbrnge

You can set the filter cap to any of three values.

[TheBigMan]

There's a layout for a Rangemaster NPN with selectable input caps in ym layouts gallery.  Not verified yet, but I've node checked it and everything looks fine.