Hardware hack - replacing a pot with a switch?

[Daryl <highhorse@mhorse.com>]

I've realized that the only way I use my Digitech PDS 2000 is to hold a 
phrase, then twist the delay time pot all the way up or down, giving me 
a two-octave pitch jump.  I sometimes do this with other pedals too, 
that is, I don't need fine-tuning, just the extreme settings for a pot.  
Generally, or specifically speaking with this pedal, is it possible to 
replace a pot with a switch?  If so, how would I figure out the value of 
the switch I'd need?   I'm handy with a solder gun, but awful with math...

The coolest thing would be if I could add a switch in addition to the pot.

thanx.

Daryl Shawn
highhorse@mhorse.com