Thanks Peter, I shall follow those instructions.

I didn't want to replace the original No 4(T) rearsight which has its ground-off battle sight. Hence my wanting to fix this one up. Yes yes Peter I know it would be OK in your hands but I am a sentimental fool...

As for a target sight: I use the PH 8/53 sight, which is a quick fit to the original rearsight.
I had even hoped it would flip down and allow the No 32 scope to sit above it - but no such luck - even with the eyepiece unscrewed the 8/53 sight body prevents proper seating of the telescopic sight.
Rob