My 110A conversion was certainly not that expensive. But to be honest, it will be as big, if not bigger than the 600SE, though may weigh an smidgen less. Can´t see the point really. A 180 would do you fine. Or you could shell out for a manual "option" from Nate (Option8 on flickr). He does many a conversion, including taking 100 type auto pack film cameras and doing one of several manual conversions. Either just replacing the electric eye with a circuit that can be manually controlled, or replacing lens with a regular shuttered 127 or similar. The latter should be quite easy for most people with no more than the usual two thumbs.