Thanks for all of the answers, guys ~
Due to the suggestions, I'll probably just replace the Extractor and hold off on the Extractor Spring w/ Plunger and Ejector, for now. Will still install the OP-Rod Spring Guide, though. Can't see it as being too tough of a task.
Thanks for the link to the bolt-tool, bmyk. I can see where needing a tool like that would come in handy for doing more exclusive work on the bolt, but not necessarily for just replacing the Extractor. Also, I like the glasses comment. Haven't got to the point of getting glasses, yet... but, I can tell it's not far off in my future.
Didn't get many bites on the mount, though. Guess it's relative to what folks prefer, since many opt for the more traditional-style like the Springfield, Sadlak, etc. My opinion on the Troy-mount was catered primarily on rigidity and stability. Well that, and I plan on placing a fairly "large" scope up there. The cost of it was more closely related to the Sadlak steel-mount, as opposed to the Sadlak titanium-mount - which added another $100. Oh well, if money only grew on trees, right?
Hope to get some time on the rifle using the irons this weekend just for fun - weather permitting. Picked up some 168 gr. to "make" some brass and get some readings off the chrono. Getting rather anxious, to be honest.
Again, thanks for all of the support and suggestions. And, if anyone else has any opinions on scope-mounts - for those who use them - it would be appreciated, as well.