6400M on the air yesterday 2/20. Ordered 6/18/2017. Received invoice 2/12/2018 Still learning all the ins and outs of it.. Further reports and pix as time allows. Thanks Flex for your efforts in producing such great radio.
Jim - Enjoy your new radio. I am also interested in hearing about what you think. I'm also a first time Flex user and still waiting for my 6600M ordered 5/23/17 and invoiced on 1/25/18 - very frustrating.