I'm working with a food manufacturing plant and they would prefer a metal stylus for the MC55 over the production plastic stylus. The reason for this is that as they mix the ingredients for the food products there is a chance that the stylus could fall into the mix (I know it is tethered). They have a magnet in the drain which would extract a metalized stylus if this happened.. We have already looked on the web and found some candidate stylus--I'm looking for anyone who has encountered a similar requirement and the specific stylus which was used