Another way of doing this of course is turn on the crosshairs in your camera software and use the finder or main scope cameras.
I've always worried my scope mounting wasn't totally orthogonal with the mount, so recently I drift aligned my heart out in alt and az then tweaked the mounting assembly best I could to get close to the SCP.
Anyway, I've also attached some guider (SSAG) and CCD (QHY9) pics respectively for those interested. My FOV for the finder is about 2.5 degrees and the CCD about 1 degree. Hope these are of some use. Obviously you have to make sure your finder is very well centred on the CCD field (I used a bright star to do this). My finder in normally at PA180 (upside down versus the CCD when that is set up for N/S East/W i.e. PA 0 degrees).
p.s. I didn't say I was perfectly aligned here either for you perfectionists, but Maxim hardly even nudges my dec with this sort of alignment, so its not too far off.
Actually I'm getting the best Polar alignment I've even had by pigging-backing some home made VB.NET off Maxim that monitors the average subpixel drift with tracking turned off and converts it to an arcmins value. I find with just 20-30secs of drift data I can get a pretty good indication or where I am for iterative adjustments. The monitoring time is left to increase of course the closer I get to the pole. Program also converts arcmins into "standard skywatcher azimuth knob turns" which is now an internationally metrologically sound unit for expressing PA error at my house......
