I'm checking eBay for a used Access Ti2 (w/keys) or DSI Prophet 12. With used workstations, I just reset the instrument to factory setting and started from scratch. Do I have to worry about any programming that previous owners have done to their synths that might make it impossible for me to get a new Access or DSI synth to original factory settings? The eBay ads will say great or excellent condition, but I want to make sure that I'm not limited by any former programmer. Can a user screw up the programming on these machines where you can't get it back to original even though it may be working fine with the current owner's own programs? Thanks.