I don't feel comfortable on electric 12 strings either, and you're right: it's harder to play riffs and solos than on standard strung guitars! Moreover, Edge doesn't make the most of his 12's (personal opinion), so you don't need to suffer the 12-strings unconvenience in order to sound like him. Just get some nice chorus onto that Ricky beauty and rock on!!!!!!!!!!!!PS. I love the acoustic 12's though
Otherwise I'd probably of picked one of those up by now!