Don't know much about the Flex. It was acquired from a SK estate in known working order and I have never used it. Has Edirol FA-66 firewire sound card which I had working on my computer for another project. Ill include a PCI-E parallel port card for flex control and a PCI Firewire card for Edirol, which I was told works with the sound card but never tested that as my laptop has firewire, firewire cable, and audio patch cables to go from Edirol to the Flex. I do not have a manual or software cd, these can be found online for download. Buying AS IS, Paypal OK, Will ship insured to your QTH $450 Please Email me at the address on my QRZ page.