I have used loads of different ones, we like Metoxit a lot though, as for the rfid. We had a compressor a few years ago that seemed to like tripping right in the middle of a mill cycle, and those stupid tags wont allow you to restart the mill from the stop point and if its a block then you are f****d because once its scanned then its used. Well one day we had a 6 unit bridge going and the comp tripped and I had run out of material, this thing was for a mate of mine and he really did need to work on it the next day, Rang our German friends and told them and the response was, we will get one out for you tonight, not much use when you have to get work out the door. So for the next 6 hours I gave myself a software masterclass and the rest, as they say is History.........