I installed a Nissens and thought I had a leak just below the expansion tank. Turns out I'm out to lunch and it was just left over coolant from the bleeding that had accumulated and was seeping out.
So...the new Behr has arrived and if anyones interested (especially Canadians so you can save on all duties taxes ect.) let me know before I send it back. I'll sell it for $175 US plus shipping.

Thanks,

Dave M