My 2818/900 has the spacer with no cooling holes cut in. Using a 1365e prop, it never gets warm, and I fly the FOAM (for lack of better 4 letter verbatum) out of this plane. The 2100pl and AirBoss come down very slightly warm, that's about it. The fat wing on this thing makes it fly so SICK!!!!
3rd flight had me doing inverted harriers on the deck with the wind a blowin'.
TR's look cool as the plane floats away laterally spinning like a top. I think we have a winner!