"slightly testy" is how I would characterise Malcom's remark on this thread. But let us remember that he comes from Yorkshire, and we should be forgiving. In the best of all possible worlds, Malcolm Douglas would never be testy, and other Mudcatters would all be as knowledgable,rigorous, informative and helpful as he is. Neither of these things is likely to happen, so in this slightly flawed world, however, we must all just muck along as best we can.