Apologies for the late reply, didn't think admins were going to approve this thread and kind of gave up on BBS. Glad they did a few days after posting it.
It was hot reblued by Colin, formerly of Manchester Air Guns. He's quite well known for his excellent work rebluing guns and he did a fantastic job with the Gen 5 I must say.
Thanks for the nice messages, glad you all liked the pictures . If only photo embedding was possible, would be easier than clicking individual links