I can't recall if I actually know anything or not most days but do know that the Legg/Orlen fix does work for Citoris, at least it did for me on a 425 which is not a sxs. However like Anton I think we might consider what gun it is and I'm willing to be patient with the idea of "type of action" (or subtype) in that I think I heard somewhere that there are forend mechs which don't push the rule joint against the knuckle in a death grip. Cocking hammers and ejector trains on opening can MAKE a gun feel stiff and awkward. My AyA numba 2 is not exactly an easy opener with the ejectors operational (which they aren't at the moment). Graphite is abrasive so however smutty it is, I don't think I'd be in a big hurry to give everything a general grind.
jack