spinnaker block positioning

Roger, I think your question about positioning spinnaker blocks warrents a new thread! The previous owner of my boat had it professionally rigged and raced a lot, so I assume they were positioned correctly. They are located about 6"OC forward of the transom rubrail, and about 3"OC from the gunnel rubrail. I'd be interested in the rationale for this positioning, as I've seen them more inboard on the aft decks of other boats.
Somebody might chime in with a recomendation from the manufacturer--wasn't there a DS1 handbook floating around?
Somebody might chime in with a recomendation from the manufacturer--wasn't there a DS1 handbook floating around?