I bought one of these, took about 10 days to arrive, been using for a week now. Very impressed so far, been using it to measure some T1 injection mouldings, mainly for hole positions. I am struggling to work out how to get it to probe a "boss". Just started to do some forum searching and may well contact the supplier to help solve this problem. I needed to buy the license (£18.50) to be able to calibrate the probe and measure lots of holes, but hey £18! Simon