I've bought and sold a few lenses in Copal 3 shutters in the meantime, and while it's nice once in a while to throw the elements into one (and I have a 300 Symmar-S in Calumet clothing), the primary use has been in a studio environment, and for that, the Sinar shutter is head and shoulders above a separate shutter. (especially when using a compendium/multipurpose standard and the bellows mask 2, it's just too tight to get in there to adjust and cock the shutter, never mind adjust the aperture. I'm slowly accumulating a full set of lenses for the studio, and if by any chance anybody has DB lensboards (at non ebay/crazy pricing) lying about, I may be interested as well)