All of the Gundam pilots' names have a number theme: Heero Yuy ("Hee" being Japanese kanji for one); Duo Maxwell ("Duo" meaning two); Trowa Barton ("Trowa" based on the French word for three); Quatre Raberba Winner ("Quatre" is the French word for four); Wufei Chang ("Wu" is Chinese for five). Also, most of the other characters also have this number theme, ie. Milliard Peacecraft ("Milliard" is French for billion); Lady Une ("Une" is French for one); Treize Khushrenada ("Treize" is French for thirteen) and many more.
In the flashback sequences throughout Endless Waltz, the flashbacks imply that the "custom" style Gundams featured here are the ones the pilots have had all along - obviously incorrect and inconsistent with the series.
At least two different versions exist: The SPECIAL EDITION DVD, released February 2001, features both an 3-episode "miniseries" version and a 2 hour movie. The OVA (the miniseries) is missing some footage. Cartoon Network, in addition, edited a version with a Y7 rating for broadcast in 2000. This episode removes all blood and inappropriate language, along with a few choice sequences (including the entire appearance of Dorthy Catellonia and Wu Fei leading the civilians against Mirameia).