You may have heard of it elsewhere, but I thought a few of you might be interested in this thread on Pistonheads ... [URL]http://www.pistonheads.com/gassing/topic.asp?h=0&f=141&t=543304&i=0[/URL] You can ignore the fact that it's 110 pages long (ATM) and just skip the (mostly) dross between posts by the OP. Well worth an hour or so to read.