Diesel911 - Were you saying that the lower second test number could possibly be because of faulty equipment?
rscurtis - Thanks for the tip. Embarrassingly, I had to look up TDC, but now I know.
I think double checking the valves is a good idea, so here's my plan:
-finish cleaning the injectors and replacing the nozzles
-another valve adjustment (probably with Junkman who's offered to be point)
-run the compression test again (hotter this time)
-if still way off on #4 and #5, or still low all around, try the leak down gauge next
That sound like a good plan? Thanks everyone!