Test flown my Flash this weekend didn´t noticed any heat problems with JetCat P-120 and full bypass and Naca cuts.
I´ve flyed it for about 8-9 flights with no fuzz.The only thing that I´ve noticed on almost all instructions no matter what company it is.
The recomended rudder.aileron.elev movement is almost perfect when you take about half of the recomended(if you would like to see the plane in a roll not just hear it).My Flash ended up at about 11 kg .Elevators about 14 mm aileron 12 mm,Flap 50 mm and rudder as much as you get.CG as instructions.
A lovely plane to fly.