...Yes, it's true. Someone took the 930 calipers off of this turbo and installed RSR binders. One of the front RSR calipers had a cracked halve https://pbase.com/slidevalve911rsr/image/57590914 and I was able to find a spare part to save it. I'm sure the owner of the 930 is very grateful for my assistance in the repair of his RSR front caliper but not in a hurry to sell those RSR parts to me yet. :(