I also have a geared 29ee which can cruise at 15mph.
I must admit that’s an impressive claim and my interest is being tickled. I do still struggle to see the point though, other than the mastery of a pointless skill (unless, like me, you are a massive show-off, which you claim not to be). Part of growing up is the understanding of what works well and what does not. Two wheels work better than either one or three.
I eventually grew up, saved my paper round money up and bought something with two wheels. It allowed me to do my job better, I had more fun at greater speeds and no-one pointed and laughed, unless I was falling off, which I frequently did.
Sorry if I’ve been harsh (especially thinking of the OP here) but I suppose I’m still a bit crap at juggling so I may be a bit biased.