A collector will not look at an upgraded Super. In fact, an original gun that is not included in the factory records is also hard to sell. There are Grade IVs on the market right now that can't be sold for any reasonable price because they are not in the records. They are wonderful guns, but can't be documented as original, so they are almost impossible to sell, even at very low prices. The quality of work on an upgrade is rather immaterial to its value.