I have a Demon airframe complete, CF and glass on fins, covered in 1.87 oz Ceconite (SIG Koverall is the same material but quite bit lighter) shrunk drum tight up to the full 350F, then sealed with nitrate dope, primed, and shot with gloss white Hobbypoxy. Torsional stiffness is amazing.

You don't get a heavier finish. The complete empty airframe weighs 615g = 1lb, 5-3/4 oz. Plus 39oz = 3lb 12-3/4 oz.

These are your three grades of Ceconite aircraft covering BTW:

[TABLE="width: 92%, align: center"]
[TR]
[TD="class: style4"]FABRIC TYPE
[/TD]
[TD="class: style4"]WEIGHT
[/TD]
[TD="class: style4"]THREAD
COUNT
[/TD]
[TD="class: style4"]BREAKING
STRENGTH
[/TD]
[/TR]
[TR]
[TD="class: style2"]LIGHT (uncertified)
[/TD]
[TD="class: style5"]1.7oz/sq. yd
[/TD]
[TD="class: style5"]98 x 98/in
[/TD]
[TD="class: style5"]Average
67 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C102
[/TD]
[TD="class: style5"]2.6 oz./sq. yd
[/TD]
[TD="class: style5"]68 x 68/in
[/TD]
[TD="class: style5"]Over 102 lbs/in
[/TD]
[/TR]
[TR]
[TD="class: style2"]C101
[/TD]
[TD="class: style5"]3.4 oz./sq. yd
[/TD]
[TD="class: style5"]65 x 58/in
[/TD]
[TD="class: style5"]Over 125 lbs/in
[/TD]
[/TR]
[/TABLE]