ive got a problem im trying to build my own thrust tube for a df with no luck ive tryed laying fiberglass(3/4 oz cloth) on a sheet of glass to create a flat piece of fiberglass that i could roll into a tube but it comes out about as stiff as a piece of toilet paper ive tryed to double the fiberglass and even tripled the fiberglass with no positive results is there anything else you can build out of?? what about aluminum or tin like flashing im getting frustrated any help would be appreciated thanks donniercjet