Hey from dougs description of the mod it sounds like he is doing only work to the analog circuitry of the front end to the a/d sounds like op amps.... if the gain is going up...
I wonder if he really has changed the chip. If it is a chip change could it be buffers or op amps in a network. Is there a replacement to the current a/d chip pin for pin on the market? If so I got to think the traces will have to change. These chips run on the hairy edge of squirrelly LOL... If the chip has changed has the noise floor gone down? Not that we need it LOL.
I would love to hear from Doug what the mod includes from a schematic or block diagram perspective to get a handle on whats going on... Even with out values on caps op-amps resistor networks etc... Sorry its the EE and v3 owner in me cant help myself
Thanks
A