Easy to assemble, no Eagle Scout skills (tripod lashings) required.
Not included: 3/4" PVC pipe, 8 ft long, 9 pieces; Canvas or bedsheet.
Sheet used was 9ft X 12 ft (suggestion from "Boredom Busters")
Added 1inch size (8 holes for 1 inch diameter PVC)
Added update to the 9-hole part, to thicken the walls for strength against cracking during assembly (new file: TP_9_Hole_thicker.STL). Now 140mm in diameter.
The 3_Hole version can be printed in the default orientation for strong adhesion to the build plate, or upside down if you don't need much adhesion.