Well was playing around today to see how my Duo compared to my Novak (rubber TC). Was kinda hard to compare because the track was pretty green, but I started at 3.57 at about 100 degrees. Went to 3.33 and came off at I think 125.. so I went to 3.21 and still didn't thermal.. off at around 170.
Tamiya TRF417X (Lion's Automotive GTR)
Tamiya F104W MP6/4 converted to F104X1 (Renault R30)