I've started doing the 2-eye method using my standard straight-thru finder, it works quite well on bright objects (stars/planets), but didn't find it worked so well (for me) on open/glob clusters.. maybe I just need more practise at it.
I've also found that I can align the scope pretty well just by looking along the top of the finder.. I usually align that way first, and find it's near the crosshairs when I look through the finder, and do a final adjustment that way. If the EP FOV is wide enough, sometimes that naked eye positioning is all I need.
I've gotten pretty good at it from my dob webcam imaging, because I have to realign every 12 seconds as the object drifts through the FOV.
I'm thinking of getting a Telrad, would be good with the charts you mention.. but now you've got me thinking whether I should, if you think the 2-eye method eliminates the need for a telrad
