A temporary bracket to which to attach the magnetic chuck drill to enlarge the drain holes. The current (small) drain hole can be seen in the bore just inside of the lower centre stud.
Photo: Laurence Armstrong

The 'magnetic' drill being used to drill out (enlarge) the drain hole.
Photo: Laurence Armstrong

The larger drain hole can be seen to the front and rear in the bore .
Photo: Laurence Armstrong

Drilling out the cylinder end cover to take a new pressure relief valve.
Photo: Laurence Armstrong

Drilling out the cylinder end cover to take a new pressure relief valve.
Photo: Laurence Armstrong

The resultant hole in the cylinder end cover now tapped to take a pressure relief valve.
Photo: Laurence Armstrong

The resultant hole in the cylinder end cover now tapped to take a pressure relief valve.
Photo: Laurence Armstrong

The left hand cylinder cover fitted after being modified to take the pressure relief valve.
photo: Andie Shaw

More holes drilled out to release the rear drag box.
Photo: Laurence Armstrong

All rivets and temporary 'safety' bolts removed from the left hand side of the drag box.
photo: Andie Shaw

More brackets now manufactured for the lubrication pipwork.
photo: Andie Shaw .

How does this fit you Sir? Trying the whistle for size in its potential position.
This is a QJ class whistle very kindly donated many years ago by the late Handel Kardas, the former editor of Railway World.
photo: Andie Shaw .