After rolling and fooling Heuhen's version of the TAK-120 around I came to conclusion that it look nothing like the real thing
So i scaled down my builders blueprints for Turunmaa and Pohjanmaa classes, both featuring the mount, redrew its shape in SB scale and then added all the artistical features of Heuhen's gun (and barrel) into it to keep some continuity.
Also, here are the bofors 40mm L-70 in the open and (one of the) enclosed mounts used by Finnish navy. They are also scaled from those afromentioned plans, so should be in proper scale finaly.