The Aiwa mod is $130. plus shipping. I did not ask about a warranty. The mod includes some internal parts upgrades and fitting it with a special digital cable (included) that will plug into the toslink input of a dac. For $90 (cost of player) plus $130, and if this thing just sounds ok, it would be worth it to add multi-disc capacity to my system. I won't be able to get this done until early next month, but will report back if anyone is interested.