I posted my first post here in the new members section:
http://parkerguns.org/forums/showthread.php?t=28911
Long story short, drove the gun up to Dan May in Oswego where he confirmed a weak spring, and a full fix has been done (paid for by the dealer) and now I have a 28g repro shooting fine and in fantastic condition. Miller Single Trigger/Classic Gunstocks (aka Dan May) is a fine resource (and genuinely nice guy) I wouldn't have known about without this forum. Many thanks folks for steering me to someone who could sort it out.