Dude,

The other night we had a 4 minute pass that was incredible.

Some good tips?

Your hand made into a fist covers approx 10 degrees of height.

So, at an approach of 40 degrees from the west?

Look west, make a fist and extend it in front of you, Line the bottom of your fist on the horizon line, thumb up.

The top of your fist is 10 degrees off the horizon, "stack" three more fists on top and that is about 40 degrees up.

good luck.