Thanks for the input everyone. Ya'll are always super helpful!

Assuming I'm way under torque (since I only have a 6" ratchet), if my bolts were to come loose a little I can just tighten them back up since I haven't hit that torque spec, right? No need to take the arm off and reinstall, and no need to worry about splitting the spindle hole?

I'll go find a torque wrench and get these bolts tightened to spec ASAP. At this point, I think I do enough of my own wrenching to justify a decent tool set. I'm just trying to gauge how much damage (if any) was done. I've probably only put like 10 miles on these crank arms so I don't think I did anything catastrophic.

Also, what are your views on greasing a spindle/not greasing a spindle? I've always been told to not grease a square taper, but Sheldon's site suggests otherwise.