How much does he cost? And exactly how does he do it? I can't really think of any other concievable way than to use a circular clamp, like the one on ebay.
Rob- like tekrsq said that OS uses a process that evenly applies pressure around the P/S. If you email him he'll send you the articles that the Mag wrote about the process. I had a few sleeves done and he's awesome. Did you get you car from ebay yet????