[r-t] Lead head codes

[Graham John]

On 13 April 2017 at 15:48, Philip Earis <pje24 at cantab.net> wrote:

> For "regular" methods with palindromic symmetry (ie nearly all rung
> methods) then the key information is which bell is the pivot (and hence
> which place bells are opposite, which also tells you where bells will be
> at the leadend, and which bells cross at the halflead).
>
> Leadend order is an unhelpful distraction.
>
> So for example Cambridge and Glasgow (both 3-pivots) are structurally more
> similar than Cambridge and Essex (a 6-pivot), despite Cambridge and Essex
> having the same "leadend order".

But the leadend pivot is also important, so if you group by both the
half lead and the lead end pivots you end up in the same groups as the
existing leadhead codes. I can't see a problem, nor a mess.

Graham