'Hard Machine' from the Tour LP might qualify. Most tracks from the Gospel sessions seem to co-credit Mark Gemini Thwaite to some capacity but Hard Machine is Watts alone, and it sounds quite different. "Ecstasy and Exorcism" off the VIP CD is an instrumental that is for some reason credited to..."Watts, Watts". "Rise & Repent" is a quick minute and a half number that kind of sounds like something either conceived as an intro to the album and discarded, or what gave birth to the concept.