[rcdart]

After a week of reading all about Futaba FASST RX's having overheating issues, and resulting in them shutting down, I did a bit of a mod to my plane today, and put a small cooling duct in the side of the fuse adjacent/just forward of the RX, this proved very successful, after each flight the RX "felt bearly above ambient, and it was surprising how much it cooled everything else as well.
That aside, this morning I used a heat gun to try and induce the problem, and could not get it to shut down, I did not have a temp gun, but I did get the RX a lot hotter than I would feel comfortable with (very, very hot to touch) So I personally feel comfortable using the system, I remove the canopy from the plane whilst sitting on the ground and park it in the shade, so that removes the baking effect on the ground.