You may not care about these reports but since you are conidering a conversion I thought I would share my experience with the Futaba FASST change over from 72 MHz.
I coverted my Supra glider yesterday. Today I did the AVA. These are high end gliders with carbon/kevlar fuselages. If you want to see them you can find them here:
I have the FASST module in my radio. Both got the 7 channel 617 receiver. The AVA is the same Carbon/Kevlar fuselage material as the Supra with a Carbon Kevlar nose cone. If you want to see the arrangement you can look at the build manual. I don't have a shot of my install yet.
The receiver is inside the fuselage, under the servo tray. One antenna inside and one antenna above the servo deck in a tube that holds it up off the deck.
I put the AVA carbon/kevlar nose cone on and did a range test. So the antenna that is above the servo deck is inside one layer of fabric. The one below the servo deck is inside two layers.
I set the fuse so I am looking at it from the bottom, as if it were directly over head. I think that would be my worst possible position based on the shielding by the fabric in the fuselage. No side view at all to avoid the fabric layers. There is probably a 60 degree angle between the antenna. Range check was 45 paces. Amazing.
However I will be switching to a fiberglass nosecone so there will be even less shielding.
Love this FASST stuff.