I tried several items to make the form for the curvature of the skirt up onto the canopy. I finally settled on foam pipe insulation cut into strips. The pipe insulation was left over from winterizing my deep well. I think it is for a 2" pipe.....It worked great.... The work on these skirts has taken about 2-3 weeks of head scratchin' and figurin' out how to do this. All in all I'm gonna have about 100 total hours in the skirt........hopefully, it will show......