After several narrow band images presented with prominent halos I was advised to contact Astronomiks to seek replacements of the defective filters.
I contacted Gerd from Astronomiks with advice from Mike Sidonio. Gerd asked me to present certain information and images and it turns out I had defective filters.
Astronomiks have subsequently replaced those filters for me and I now need to send the old filters back for batch testing.
I just want to say thanks to Astronomiks for being so good about this as I bought the filters nearly 3 years ago and yet still provided a warrantee.
If you want to see what the halos look like
click on this link.