Started my build last night. got the board almost completely stuffed and have some questions...
1) R29 and R28 arent on the THAT build BOM.. do I need them?
Nope you don't need them if you are building a THAT chip build. R29 biases the discrete VCA positive supply and R28 is part of the discrete vca symmetry circuit
2) The caps at the right sid eof the power supply on the board and schem say 10uf 16v the BOM says 25V (im guessing the 25s will work)
yep they will work and wont mind as much on your first power up while you adjust your voltages if they are more than 16v for a bit.
3) C16 on the board says trim and no value, its not on the BOM either (jumper?)
No, that is to trim the 22uf timing capacitor. chances are you will never need it, unless you want to experiment with different timing capacitor values and a switch. So do not jumper it, if you do it will short out your rms unit.
4) Anyone tried to wire this bad boy using a Lorlin rotary switch?
very possible
you would need a least a 3pole/3position (so a 4pole 3 pos would work) .
You could also just wire it up to always be in GR mode. then you wouldn't even need a switch. Thats where my meter usually stays...
Good luck!