I mention in the doc that the Setback does have some volume drop as stock FX-90. So, I suggested changing two resistors for more output. Turns out increasing R4 ends up hitting the front end of the compander a little too hard, IMO, and produced a bit of flub. So, instead I've R4 back to 150k and increased R48 from the suggested 27k up to 47k.
While I was at it, I decided to compare regular electrolytic with the two suggested tantalum caps in the Shopping List. I ended up not really hearing a difference so I changed the Shopping List to recommend either type (this is for the two 0.47uF caps).
The pdf, schematic and all associated files have been update on the Projects Page.