ya I did my math wrong
just the top half is 6.5 OZ canopy is .3 OZ and rudders are .7 OZ and I'll say the bottom is 8 OZ and the back canopy is .7 OZ and the batt tray is 1 OZ
6.5
.3
1.4
8
.7
1
= 17.9 OZ

then I'll have to add the spar, ribs, glue and spray foam weight

yes I do use 3/16 cotton cloth and West Systems epoxy

I also just tried Fiberglast.com's new stretchlon bagging film and WOW!!! way cool if conforms to nearly any shape. If it is not quit as close to the mold as you want heat it with a heat gun and it will be