1) Milling & weight.
3) You do not need to lube it often. Maybe a once over after about 10 cases if that. Just the bolt (Triflow) & the engine (Dow 55).
4) That's an okay deal, but you should've asked this before you bought it.
Some Invaluable Words of Wisdom:
A wise man's heart directs him toward the right, but the foolish man's heart directs him toward the left.
“If you're not a liberal at twenty you have no heart; if you're not a conservative at forty you have no brain.”
-Sir Winston Churchill
"Lousy Democrats."-Homer J. Simpson