well i have put about 5 tanks through it now. I do my own break in. Sorta like the traxxas one for the 3.3 but condenced down to 3 tanks. lets just say it is just as finiky as the 2.5 where as tuning is concerned. but i can see the power potenital. the hottest it got was 260. but during my break-in it only got to 200. we'll see what it does. since the 3.3 revo is just a bit longer than the 2.5r, you think the OS 18 will still be a hoss in it. or think the 3.3 will over power the OS? I love the power it has in my S-Maxx, man that thing screams, especially after it hits 2nd gear.