[Christ]

Retorque the head bolts after first warm up cycle, and I like to check them again after about 10-15 cycles, as well, after you've put a few miles on it in varying conditions.

Compression test you can do at any time, really. If you keep a really close eye on it (I mean check it 100 times in the next 30 days or so, then keep an eye on it once a month after that) you'll notice that it peaks out, then drops off a little for each cylinder. The slight drop in compression means the rings are seated and worn in fully. (This won't happen if you used sealed/gapless rings, at least not as noticeably).

Doesn't really matter, I doubt you'll want to keep that close of a watch on it.

After it cools down, drain some of the oil out of the pan and check for metal shavings. If they're there (more than likely are) you can either just change it, or drain and filter it, then put it back in. I often find myself putting the same oil back in and using a cheesecloth or gauze to filter it first, then changing it after 500 miles or a few hours of run time (depending on the application).