be patient day or two - then we'll have proper schematic with proper nomenclature , so explaining things will certainly be easier ;I'll make small batch of pcbs , so you can count on that ....... but be aware of possibility that someone on big DiyA came with closer approximation of real J2 .I intentionally didn't count parts in J2 , so I use it as general guide , really wanting to Babelfish it , not clone it .edit - all values of pots , along with dedicated series fixed resistors , are chosen to prevent any smoke scenario