Okay, let me throw a little icewater on that salesman's pitch. There is really no difference, other than having a slightly different programming protocol, between FASST and FHSS systems. Granted, there are a few whistles to make it seem better but all the guy is after is to sell a higher dollar unit. If you talk to Mike "Grimracer" Zaborowski, someone that has worked for Hobbico/Horizon, he runs all FHSS systems in his boats. He would tell you to run an Futaba FHSS receiver that has "Diversity" on the front of it. Trust me, I've butted heads with many R/C boaters and those that run FASST systems usually only run them because they have the money to spend or want the latest and greatest. I could be running a 7PX with FASST receivers but don't since my 4PLS will do the same thing for less than a third the price. The 7PX is a $700 radio while my 4PLS costs only $190, both of which are available on the Futaba website.