Lu, good listing there. It was quite interesting to read some of the newspaper articles. However, with the information gathered out of the witness statements and the rotor blades bent underneath the aircraft it very much sounds like a rotor stall rather then mast bumping. But that's only a suggestion based on similar occurences. It will be very interesting to see any further progress you are making. Just out of curiosity, have you ever been threatened with a lawsuit?
To SkyCop:
What machines are you flying then?
Keep in mind that there are people out there that are very experienced in all kind of types of helicopters. E.g. I am currently flying as a Capt. on 412s offshore, have flown most of the Bell single and twin range and other types like 500s/ 520s, etc. but I still love to have a go in the R22/ R44 and play.
Keep in mind that nowadays many commerical pilots are not so fortunate to be military trained and when you have to pay for your own training- well, the whole thing looks different.