modify the taper on an opto electric volume pedal?

[pinkjimiphoton]

my bud bob stern is asking me if i can mod his morley to have a wider "sweet spot" for adjusting the volume with his morley volume pedal..
says it's too hard to get a good change between too much and too little when trying to control a piezo kind of system/magnetic system on his guitar, but says "I want to be have an easier time lowering the volume a little bit less than full volume. There isn't enough room at that end of the sweep.  "

i'd think tapering resistors on a passive circuit, but is there a way to do this with a morley? i'm imagining he wants to make it so there's a substantial diff, like an audio taper or even reverse audio taper instead of linear.

advice appreciated, tried the search function but am way too stupid i think to find what i need to know.

thanks!

[armdnrdy]

Hey Jimi,

Read through this:
http://www.tdpri.com/forum/stomp-box/391722-morley-wah-volume-swell-mod-cleaning.html

You might find some useful info in there.

[pinkjimiphoton]

thanks larry!