Thank you so much for all your great tips & advice.
I'm currently in image processing kindergarten so I need all the help I can get.

I've been using 50 frames to create a reference frame, will try 150.
Tried Castrator already - great!
I am definitely enjoying this - the more I learn the more I realise there is so much more to learn...

Very lucky to have this great forum to help kiddies like me.
Much appreciated.
Arek