I used Solartex on a .60 sized biplane for the first time and found it much, much easier to work with than Monokote finishes that I am accustomed to. While probably not as critical a factor on bigger planes I was surprised at how much heavier it is than the plastic stuff. Then it was painted and clear coated adding even more weight. I haven't used 21st Century or Super Coverite and am curious if these products are the same weight/area? Has anyone weighed this stuff with an accurate scale?