Yamaha CS80

hi folks, im wondering if anyone has some insight into this....

i dropped an m-board into my cs80 that came from a cs60. all of the EG and VCF functions seem to work properly, but it is 1 octave lower. i assumed i would just tune it up an octave, but then realized that those metal trimmers, i believe, are not "infinite" pots, i.e. i dont think i will be able to tune them up. is there something else i should be doing? a jumper/mod on the board? thanks alot for your help.

       
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