yesterday I followed this tutorial to scallop my neck, though I scalloped the entire fretboard (with more than one file of course), and the dots on the frets are as shiny as always, but two things you should think of that isn't mentioned in this tutorial, is ,firstly use a very fine sandpaper after the file, it looks MUCH better that way, secondly, use some kind of oil to get the original colour of the fretboard. Almost any gentle oil can be used, I asked around a bit, and it seems that most experinced guitar builders prefer baby oil

It's supposed to be very gentle on babies, and it treats your guitar the same way

I'm not sure what you mean about torque when thightening the screws, but as long as you are very careful that the neck is in the right angle when you attach it, just tighten the screws thouroughly and you'll be fine.
I'll probably post a full tutorial for scalloping the entire neck here in a few days.
Good luck!