Have just had a closer look at the way you joined the refs together It looks ok on the surface but you have obviously assumed that because two refs were side by side they must be about the same point This isnt necessarily the case as I said before sometimes two refs were about two different points so theres no point joining them together  In future Ill keep the refs separate so noone will be tempted to join them up  This ends my participation in this discussion From now on you have it all to yourself