Noise while switching presets

[metro@metro.cqi.com]

As of late, I'm noticing a lot of noise when I switch between the B and 
Bb presets on the upper manual of my chopper B (actually an A-100).  The 
noise doesn't occur on any other presets, nor does it occur on the lower 
manuals.  Output is to Trek II SSP-3, 122 RV.  

Also, re: my Trek II...my expression pedal is wired to an old DeArmond 
volume pedal using the suggested 100 ohm pot, and it works as designed, 
that is, when I pull back, theres is only a faint signal.  How would I 
work it so that I can get the volume all the way off when I pull back.

And finally, I had the opportunity to audition the Voce V-3 the other day.
List $995, my local toy store said $795, but according to the store "the 
list was going up to $1195."
Impressions: The raw sound of the unit was acceptable.  It is a bit 
misleading auditioning the unit via headphones.  With 88800000 perc 3rd, 
C-3 and Leslie simulation, the sound seemed "phase shifty."  This was 
less noticible when played through a EV 15" and horn. As I only spent 30 
minutes with the unit, I was not able to put it through all the paces.
Since I've recorded with my B/122 and am used to the sound, I cannot say 
at this point if the V-3 is well suited to be used with a D.I. and 
printed to tape.  Unfortunately, my toy store would not loan or rent the 
unit to me at a reasonable price to test in the studio.  I would like to 
hear some feedback from V-3 owners regareding the results of mic'ing a 
live speaker or using it in conjunction with a Leslie.

Thanks in advance,
Brian Nelson