Mike,
Tower says the wing area is 456 sq/inch. I'm taking this to be the total area, did you double it?

I get 6lbs = 96oz.
456 sq in wing. 456/144=3.1666
96/3.166 = 30.32 oz/sq ft.

I'm planning on using an O.S. 32 FX and monokote. I'm afraid the fabric will weigh too much. I'm planning on using fabric on my Dynaflight Flybaby.

Engine weight Webra 50 = 320 g or 11.3 oz
O.S. 32 SX = 270 g or 9.5 oz only 1.8 oz difference. Hmmm??

Have fun,
John