Hi David .
What you have created here is very impressive. I was interested in Vocaloids a few years ago but the software was very expensive and all of the voicebanks were Japanese so English pronunciation was a problem ( no Jeff Lynne in sight lol ) and so my enthusiasm waned . Now your excellent post has appeared which has piqued my interest again. I am working my way through the UTAU Manual as we speak , trying to get a handle on it all . I can see so much potential with it going forward. Well done putting this production together.
cheers
Gary