Open handstroke and backstroke leads Interesting discussion. difficult to find much in the old text books about the open HS, other than references to 'compass' i.e. striking. However thinking of it as two different 'traditions' - closed version clearly being practiced in recent history in Yorkshire and Devon/Cornwall, it is six-bell ringing that offers most ringers the opportunity to experience 'good practice', and to compare the merits of each. I remember hearing a recording of some very good Yorkshire minor ringing in the 60's (Edgar Shepherd's book and EP). Either slow minor ringing or call changes can thus be very good either way - if the ringers involved can hear their bell ...... ! (and have that sense of rhythm which can accommodate the 'art of ringing'). There's no excuse for opening up the back-stroke - that just illustrates that they don't concentrate on their leading, or can't hear their bell at all.
The reason why the 'open handstroke' became 'normal' in most of the country as far as I understand is that it averages out the tendency for handstrokes to be slightly slower than backstrokes (because of the weight of the rope). Try to have a 'two-beat' handstroke pause and you find it's too much, try to have none (closed H/S) and it's hard work on a ring of 4 or five. When ringing on handbells where 'good striking' is more easily achieved (physically, depending on ringers abitlities!), it is easiest to ask for a 'one-beat' pause rather than any other gap. I have heard of some ringers (S.major types and above) who say it should be a little closer (but not closed) on tower bells. Hm, I'm not sure about that, because 'the gap' obviously depends on how many bells are being rung! 'One beat' fits all, for the H/S gap in open handstroke ringing; seems right for me, and the bands that I have led in several different areas now.
Last thoughts - Grandsire definitely needs an open H/S - imagine doubles on the back five (no tenor behind), rung at exactly the same pace as caters with tenor behind. Lovely stuff (esp. if the caters has lots of titums and hanstroke home...). Contrast the music produced.
On the other hand - following the Yorkshire tradition ring Grandsire minor with closed H/S! (oops - some of them don't like Grandsire ... !)
As has been mentioned, it all depends on the band, local (or peal-ringing!) traditions, and the ability of ringers to 'hear their bell'; but also - I would suggest, to appreciate that sometimes it is worth exploring some of these 'variations' in our art. They are not 'foreign' - just regional!