> Is it too wacky to use four pushbuttons instead?  These are easy to
find 
> in IP67.  Means you have to add some circuit to keep the power going, 
> but may make waterproofing much easier.
> 
> Arranged carefully (or using different shapes), it might be easy to
tell 
> by feel which is which.

This by far would be the ideal solution, they are going to take some
persuading but this is the way I would really like to go.

Steve

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