the 650's pictured as received, just beginning basic disassembly and inspection. Amongst other signs of neglect, emulsion tubes found badly varnished, bleed holes plugged solid. Definite attention required.
Another odd ball...found 2 orings installed under each pilot screw! Somebody was in there before, installed new, failed to remove old! And, curiously enough, the same exact spec oring as used on your 250 pilot screw!
Anyways...fun ongoing.