It is 90 turnes of the handwheel for 360 degree rotation = 4 degrees per rotation of the handwheel

The major scale on the handwheel is marked 0, 1, 2, 3 = 1 degree per indication.

The minor divisions on the handwheel are 0 to 60 seconds on a vernier scale (which I am not overly worried about).

So, if I am trying to lay out a 4-bolt circle, starting from zero, I advance 4 revolutions of the handwheel (88 degrees) PLUS 2 minor divisions (1 dgree each) for a total of 90 degrees. To hit 180 degrees, I need to advance another 22.5 turns and end up on the 0 marker on the handwheel. For the 270 location, advance another 22.5 turns to end upon the 2nd minor division on the handwheel.

Are you confused?

**I sure as heck am!**I always screw it up and end up with one (or more) holes out of place!!!

Of course all this changes when you have 5, 6, or more bolts in the circle!

Is there an easier way to keep track of the positions on a bolt circle or to figure out how to advance to the next position? (I can't afford a DRO.)