Cool, like that dial! I think brass is coming in style you know, more and more...
To answer your question, The approach taken on this project was dis-assembly, grinding the edge of the base plate around the edges to fit and smoothing it,
servicing, and reassembly. Seems to be a common procedure with the 917, but as with all mods, the sky is the limit on options. If you had a machine shop you
could probably grind out the case too, but not certain.
Also added a new main spring as well, a new white alloy that came pre-greased. Runs nice now.