Gotch'ya hookedonrc, we've got 3 of them at our field and 2 of them needed a ton of weight on the nose. 1 has an OS 50SX on it but the other has a Magnum 80 4 stroke! The third also has an 80 Magnum and didn't need any significant amount of lead. Of the other 2 I know about, 1 has a Saito 82 with no lead and the other has an OS 46FX and needed a lot of lead. It's weird! I'm thinking maybe a wood density issue or maybe even some assemblers got real happy with the epoxy on the tail surfaces... I dunno... I'll see how mine turns out. Even the "heavyweight" ones seem to fly great so, I'm stoked!