figuring out whether or not the ASP .91A series 3 is the same exact engine as the Magnum .91 XLS. Pictures on the net indicate the XLS has a squarish head distinctly different than the ASP's round shiney head, but the pictures of the Magnum have XL stamped on the engine, not XLS. HMMM? The reason I ask is the ASP can be had NIB for 1/2 the price of the XLS, and is supposedly made by the same manufacturer? The XLS has recieved great reviews, but I like the 1/2 price idea...Anybody know for sure? I don't want the ASP version of the old Magnum XL, but will jump all over it if it is indeed the ASP version of the new XLS. Thanks.