Sorry, have been at work all day.
Here's an example of the issues I have been having - some of the subs look ok, others seem to come out like this even with similar guiding numbers.
I am using an HEQ5 via EQMOD with phd2 for guiding
2 minute subs also seemed to be fine, hence my thinking it's a balance issue.
This is obviously just stretched through irfanview and saved as a jpg
https://ibb.co/LzK36dX