I'm thinking about crossing some plants later in the year, just to see what happens. I came across some information, with pictures, on the Waltham Forest Fuchsia and Pelargonium Soc. web-site, which you might find useful. http://www.communigate.co.uk/london/fuchsia/page14.phtml
It looks interesting, could be fun, and it doesn't take an age to get results. Hope this may help,

IanS