8min subs and a long FL, you certainly have the guiding sorted out (other than the one sub you found with the odd shaped stars?)
I'm still a little unsure about using ICNR, I have the feeling that it messes up the finer detail in DSO's. The outer reaches of NGC5128 are faint, ICNR might not be a good thing for this. Taking manual darks with a DSLR is a royal pain but it might be worth the efforts in the long run.
Yes indeed, when the clouds move on add some more data with that light bucket
p.s. did you use a focal reducer for this image run?
Michael