i got a rs turbo and had a slight, slight leak, the water level took a week to empty, so i bought some radweld and put it in, it stopped the leak, flushed the rad and engine out a week later, and its still sealed 6months on and not leaked a bit of water and the temps dont reach half way..
but i still agree with a repair job but then again, i tested it, it worked and now im been a tight twat!!