Thanks guys...very helpful, as your feedback reflects my thoughts, and adds a few new ideas too. Like many of you, initially at least I intend to keep it simple - much as I love Selene, she wasn't built to be a racer! Some of the advice I am getting from folks at the club is from racers, where a second set of winches is thought to be a given, plus a plethora of other blocks...as I am thinking more light air use with an asym, simple seems best and workable.
Incidentally, where do you put the snatch block? last peg on the rail, or a separate fitting aft?