'Sounds better all the time! My Reaper is powered by a MW54 as well and has a 40oz and a 32oz tank in it. With my timer set at 7 minutes I can do a couple of "missed" approaches and still land with "comfortable" fuel. Most of my flying was done at full power. I think that your wing area is about right. The Reaper is a REAL floater at 171/4 pounds and 1650 sq. inches.

John