Jarrod
I'm just a learner, but I've used Registax 4. I use multipoint alignment and select "estimate best alignment points" in which Registax selects the best points for me. So far I've had it select anywhere from 11 to 33 points. This has worked well for, except for my pics of the lunar eclipse, in which I sufferred the same problem as you. Maybe my box size was too small at 32.
Don't know if that helps, but there it is.
regards
Stuart
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