Ok, so I've got a MDS-JE470 which has a similar board to this here 480 model...   In theory, grabbing an optical out plug from one of my junk Sony CD changers and soldering it on like so would be simple no?   I'm wondering if you'd recommend hunting for a closer 5 volts/closing those neato jumpers closer to ic661...   Here it is in its currently unmodded state, making sweet, sweet dubs from my CDP-C745 via optical