Modulus ROX-15 Master Volume DC voltage issues

Trying to resolve to DC voltage on the Master volume pot, which results in a rustling sound as the volume pot is turned. Thought it was just a poor capacitor (remember I'm no technician, so don't really know what I'm doing) so wasted my time changing those! Then messaged Modulus for some advice from the experts....

[@neilmeansneil]

It's interesting that you appear to be doing product testing for the design, I wonder if they layout diagram has been updated after all your issues?

[@paulwilliams4984]

@neilmeansneil I don't know how many of the ROX-15 kits have been sold, but Modulus say they've not had this issue flagged by anyone else. Though, to be honest, as far as I'm concerned the only real issue is the Boost Switch. As for the DC at the master volume, this wouldn't have been a problem if I'd used JJ valves! As stated, the matched pair I'd bought some years ago turned out to be wildly 'unmatched' so couldn't be used in the application.