Trouble with my ultimate octave build

[copperheadroads]

I built an ultimate octave clone from a ready to populate pcb
used this pcb
http://shop.pedalparts.co.uk/FoxxTave/p ... 89291.aspx
layout & schematic is here
http://pedalparts.co.uk/docs/FoxxTave.pdf
I'm building the ultimate octave version .
the problem Is while it seems to work it is a very dark tone ,the tone knob seems to work in reverse though all 3 pots are same 100k ,but with it maxed (cclockwise) it is not overly bright & the fat/bright switch does nothing .
Volume & fuzz controls seems to work as they should, though volume maxed is no louder than bypassed & octave engaged does work .
checked all components for proper values & polarity of electrolytic caps & orientation of diodes & transistors .
reflowed all solder joints
When I originally tested the board i did not really take notice there was a problem so i wired it in the enclosure ,but i have removed it to do some debugging .
any suggestions ? diodes maybe
I've built a dozen or more pedals without much trouble ..this one bit me ....Thanks

[duck_arse]

well, copperhead, as we always say here, "welcome to the forum". we are then instructed to say "go here ..... "
http://www.diystompboxes.com/smfforum/index.php?topic=29816.0
" .... follow instructions, post results."