In Chuff Proofing (2), I showed the 'completed' superheater steady plates for both inlets and outlets. I later realised that one of the screw fixings was loose and would need to be enlarged from 3/8" BSW to M12 and the hole re-tapped for a secure fit.
M12 screw highlighted on plates at the rear
(i.e. nearer the regulator)
Having enlarged the one I knew about, when checking, I found two more loose ones on the plates towards the cab front.
M12 screws highlighted on the plates at the front
(i.e. superheater inlet)
Hopefully these will all be secure in the long term and rattle proof. (I hate rattling noises).