Just got 6600M hook up. Very easly to get started with the Quick Start. First thing I notice was the receive wow. Got the Heil Pro 781 working. Now to the manual as am lost now. Got to see about getting Palstar speaker working and PW-1 amp. From a first time SDR an Flex user I am very inpress, what a radio. Bit over whelming but will get there. Thank to all the nice flokes at Flex who I meet when I pick it up yesterday. Just using Radio now, do have it hook to the internet for updates thou.