That is a good question and I'll be waiting to see if anyone responds. There is a Widebody 60 at the club with an OS .90 two stroke. It has unlimited vertical and does snaps on the up line. The Epsilon shows to be about a pound heavier. Maybe the Saito would pull it fine with the right low pitch prop....after the engine is broken in well. I was thinking of putting the Saito .91 on an Epsilon if it is under the tree next month...unless CA Models releases a 40 sized version.