Taking more pictures would be fine with me if anyone's interested. My local gunsmith is going to check the headspace with go & no-go gauges and give her a good look-see. If he can't find anything I'm passing it along to Brian Dickicon for his ministrations. He - and Peter Laidlericon - have already helped me a great deal. Two thumbs up for them both! Three No.4 Mk.1s and a No.5 Mk.1...can a No.1 Mk.III be far behind. An then of course there's my sailing chum that has a heavy barreled No.1 Mk.III Lithgowicon with Aussie receiver target sights that he shot at Bisley in the mid-50s while working on his doctorate in metallurgy. He said that London University gave him a "half-purple" for that one when they defeated Oxford... It's a wonderful life.