On the surface it is looking pretty good! Difficult to see a lot in a 200kb version though
What is causing those errors is more than like to be mechanical. The NEQ6 has a worm period of about 7.5 minutes, are the poorer subs randomly distributed or it is every 1/3 or 1/4?
You are always more than welcome to give out your data if you wish, Dropbox is good for that sort of thing.
I'd give them a look over but I currently have unstable Internet and no laptop