Good day Bobab
There's an awful amount of past posts on here in reply to posts for those who are/were building a kit for 4 x 5 work. in fact this is and has been an extensive resource
As Daniel has said you can overcome 'the shutter issue' by buying a Sinar shutter and you can also overcome 'the lens mounting issue' by buying one of these:-
http://www.chamonixviewcamera.com/ac.../irislensboard
These 'iris lenses' are essential imo
Good luck and regards
Andrew
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