Tyvek Projector Screen

Step 4 Tape the end of the TYVEK to the steel bar.

I cut a much longer piece of TYVEK, 16x9, and rolled the extra onto the bar. this is good for 2 reasons, a) if ever i need a white backdrop i have the extra length b) rolling the tyvek up gets rid of the invariable kinks that occur when taping. Large diameter PVC might be stiff enough to be straight, but not the 1-1/2" stuff i had which is why i went to steel.