Thanks for the continued help. I think in retrospect slamming it was certainly mistaken on my part, but I have the feeling it was never really adjusted correctly on the one side in the first place. I'll be ordering a new catch from Mr Rutter (at 27 quid with shipping, somewhat preferable to the $190(US) quoted by the dealer over here.....) and trying that, although fitting these wretched things reminds me of the old joke about the definition of a gynaecologist being someone who can wallpaper their landing through the letter-box of their front door.
