Hello, and thanks for reading. I'm considering getting a used JTV-59. Are there any hidden concerns that I should know about? Have the electronics been upgraded in later releases? Can I get driver / firmware / software upgrades if I'm not the original owner? Anything else I should know? My thought is to eventually pair it with the HD500X. I get orchestral (pit band) gigs sometimes, and it would be helpful to have many virtual instrument voices available since pit space is limited. I used to sell guitars for a living, and I REALLY don't like buying online, especially used, but I don't have $1,199 to spare either. Thank you in advance!