I just picked up the front and rear elements of the above mentioned Cooke lens; I'm quite happy, and look forward to comparing it to my Wollensak 159 f/12.5, which I dearly love. But I've always heard stories of the Cooke...

But... it's just the elements. No shutter. Does anyone know whether these will screw directly into a shutter, or am I looking at a big investment in having custom machine work done?