Owain wrote

Alternatively/as well, box round the rodding eye and then fill the cavity
with e-x-p-a-n-d-i-n-g foam.

OMG that needs rewording. Whatever you do, don't FILL it!!! It only needs a
little - just enough so that it's filled AFTER the foam has expanded otherwise a
disaster awaits. (Read the FAQ) ;o)

Peter