evidence: "It’ll shut the door on this ball earth," Hughes said in a fundraising interview with a flat-Earth group for Saturday’s flight. Theories discussed during the interview included NASA being controlled by round-Earth Freemasons and Elon Musk making fake rockets from blimps. [...] By November, the AP reported, his $20,000 rocket had a fancy coat of Rust-Oleum paint and "RESEARCH FLAT EARTH" inscribed on the side. While his flat-Earth friends helped him finally get the thing built, the AP reported, Hughes will be making adjustments right up to Saturday’s launch.