this is only me commenting on anouter mates heli;

the Excell Fury Extreme on a OS 90 C-spec and curtise muccle pipe is amazing. When the engine was only just running in and on its 2nd flight it was able to climb 2x faster than my outher mates Raptor 60 with a OS 60WC. Once the engine was on song the performance was absolute ballistic.