Thanks for the reply fella. I've seen loads of your posts and value your judgement on these things. I'll get working on the plan, my hi fibre supplement has just arrived, so that should set things in motion - so to speak!

FYI - Just got a mate to give me a "control sample". She hasn't smoked for about 2 or 3 years and hadn't diluted her voids, as it was an adhoc request. Not surprisingly she got a big thick line for the Test, even darker than the Control line.

Any thoughts on if this is beacuse she is completely clean or because her void wasn't diluted?