Thanks Luke for your contribution to the forum it is wonderful to get a medical viewpoint and th einformation you have added to my knowledge bank is great, cheers, and feel free at all times to put your ideas forward, I would extend that to you all who are reading these pages as although we have some 75 active members so far only a few of you are writing, remember the only “dumb” is one you do not ask, and everyone then learns from everyone else, as I have said quoting someone else, “that after 30 years in this industry I am just starting to learn what questions to ask”, cheers, ash