Another thing I should mention: I find it easiest to pick a star. centralize the star in the FOV. de-focus star slightly until you think you see a star with rings around it. Get the star off-axis to allow the star to 'drift in' to the dead centre of the FOV THEN decide which way you must tilt the primary. Thats the hardest part, working out which way to take it!! You have approximately 2-3 secs at that mag to make a decision with no tracking.
