Looking forward to seeing this one running great one day 
I do like that Stuart dynamo, have one myself, but it looks far too small on this setup... Not sure the cast Stuart dynamo would like right either... needs something bigger.
I am searching for a bigger dynamo (not for this project) and so far have found nothing, if anyone has any tips i would be grateful to hear.
The little stuart dynamo is too small for anything i have, if anyone here would like it please PM me and i will send it for the cost of postage.
Kind regards
Ade