Vinnie Rossi.
I purchased a pre-owned LIO that didn't have the DAC module, so I contacted Vinnie and learned that he still had some old stock modules, so I bought one. The physical part of the install was a breeze, but for some reason I wasn't getting any output to the speakers. Vinnie himself traded 6-7 emails with me trouble-shooting the issue. He even sent me a second DAC module free of charge to test thinking the original was defective. Once Vinnie figured out that the issue was a simple setting that needed to be switched, all was fine and I returned the second module.
Amazing service from the owner of the company on a 10-year old product that I bought in the secondary market. World class!

