This series is not considered canon to the other Tenchi Muyo OVAs, the Tenchi Universe and Tenchi Muyo GXP TV series, or to any of the three films.
Okay, pipsqueak, whether my body is sagging or not is none of your business! What are visual psychological tactics anyway?
Washu Hakubi: Your sex appeal, of course.
Ryoko: Hey, I'll have you know that my body shape hasn't changed in the past 700 years! What do you think ...
In Tenchi Muyo OVA 3 (which it was made around 2000) the sound effects, when you set your DVD language to Japanese, doesn't match the motions of the character at all. In the English one it does match.
In the dubbed cartoon network version, the scene where Ryoko was discovered in Tenchi's bed was shortened because part of her cleavage was shown and Tenchi was reacting to it in a funny way and Ryoko's cleavage was covered with a drawn-on brassier; in the scene where Ryoko was taking a bath, she was naked but ended up with a drawn-on swim suit; the same goes with Ayeka when Ryoko removed her towel in front of Tenchi.