Good morning, jake, sorry to hear about your new Melos preamp, which I was watching as well. I've got a purported schematic (with parts list) for a Melos SHA Gold Reference (Maestro), which I'd be happy to send to you, if you think it would be helpful. While the 333 is a two-box unit, the circuit boards and the parts might have some commonality. If you're interested, shoot me your email address and I'll get it to you. Cordially,