Which Resistor For Pork Barrel Volume Trim?

[DeepBlueC]

Hi, I'd like to implement a volume trim mod on a Pork Barrel similar to what "Morgan" describes here: http://www.buildyourownclone.com/board/viewtopic.php?f=18&t=25833. The BYOC's R21 is referenced; comparing the schematics, it looks like the corresponding Pork Barrel resistor is R10. Am I right? I do see a difference between pins 6 & 7 of the 4558 in the value of one cap: it's 220p on the BYOC and 100p on the Pork Barrel. Any cause for concern there in doing this mod? Thanks.