Robd, Big Duke et al., yes they'd be do-able, though not something I'd entertain (Come on you chaps out there!). In fact, I must confess that the Gallillean sights never really have floated my boat. It's probably heresy I know, but I had sets of Lattey, Gibbs & Barnett sights & sold all of them off some years ago. Any bright young things out there looking for a challenge?

ATB