I'll take issue with the idea of a servicable parts gun. Now a few may have been bought with that intent which proved to function well enuf but generally "clunkers" (reasonably priced old guns) are purported to work perfectly and in fact don't (hellishly light trigger/sear engagement, short cocking rods, barrels whacked every which way and stocks to match.) Many a clunker SHOULD be a parts gun and isn't. Personally, I think in my case the fascination with old doubles is a romance with American industrial history rather than a belief that they're all hellforstout and will shoot foever. I'd rather have that SKB100 (which I do)and if you can't kick around a Jap Citori what can you kick around? A final word: you can take it from me that four or five 400$ dollar guns aren't going to add up to one 1.5 or 2K gun even if you DON'T half know what you're doing when you buy the more expensive one. Or enjoy the NID. Last time I checked there are others about.
jack