No guilt whatsoever. In fact quite a bit of pride. As retired military I spent a major portion of my adult life defending the principles of freedom and personal rights. Upon entering the military I even took and oath to uphold the U. S. Constitution.

I have only done work for those who have handed me a chip and requested that I work on it. I feel it is their right to do what they want with their own personal property. They all feel the same as I do. Nobody has ever handed me a chip telling me not to work on it, but I went ahead and did it anyway.

You don't need an X-ray machine to detect most repair work. It can bee seen with a jeweler's magnifying glass. Just like body fender work done on an automobile. A small portable version of these can be purchased at Harbor Freight for a few dollars. The "club" could carry them at their concession during the convention. A high resolution scanner would be very reasonable and could be made available by the host of any show to scan pictures of chips on a sales agreement for transactions in question.

When a repaired chip changes hands with 'full disclosure", a copy of the sales agreement should be kept in proximity of the buyer's collection to prevent any future owner from unknowingly getting a chip passed to them by osmosis.

There's probably lots more that can be done to preserve and protect persnal rights/preferences. Nobody seems to want to sit down and discuss these options. The prevailing attitude is to continue the "witch hunt" to tar and feather somebody for partipating in a perfectly legal activity.