Ghost,

I look forward to your build!

2 lbs sounds like a really light M20. If you can do it, she will fly really nicely on the Cox 15. I think the design was supposed to come around 48-56 oz (3-3.5 lbs) but admittedly MK designs, although beautiful, are a tad heavy.

With a wing area of a little over 3 sq ft, at 48 oz she'd have a loading of 16 oz/sq ft. At 32 oz, she'd be down to 10.7 oz/sq ft! That's on par with foamy loadings.

As a possibly useful side note, I recently covered a 40" span model (~26 oz AUW) with MK and some lighter stuff as well. The 12 oz airframe gained about 2.5 oz from the covering, trim and painted canopy. The finished airframe weighs 14.5 oz and the radio and electric motor gear weighs 10-12 oz additional depending on battery used.

You might also find my rearranged M20 plans useful. I tried to unclutter them a bit to aid in scratch building. You can download the 5 page PDF from here:

http://www.4shared.com/file/77215541...s_Reduced.html

Build on!

David.