Keep in mind that the component numbering between the previous version of the CC (ver.2) and the current version is different. For the most recent version, I re-numbered the components to be more linear from left to right.
In ver.1 & 2, C15 is a 5n power supply filtering cap, not from the tone control. You do not have to use 5n for this. 4n7 is fine.
In ver.1 & 2, C15 is a 5n power supply filtering cap, not from the tone control. You do not have to use 5n for this. 4n7 is fine.