Have a friend who owned the JB-99 and gave up the ghost, couldn't blame him. It is definitely awkward to use for shows. He went with the CAV's software and wrote code so he could use wireless laptops for signup. The signup part works well, would be a neat feature for Hoster. have one or two laptops via wifi provide the host machine with a signup list. He also came up with a way to prevent multiple signups by one person....
The CAV's DVD players like the later model of the 203 and some others have USB and hard drive storage. CAV's loaded some of the Hard disks with CAV's SCDG music. Its ok for home use, but not for Karaoke shows.