Ok last moon shot from me!!!
Had another go tonight see what you think and let me know...
Canon 300D Sigma 170-500mm Lens
Focal length 500m
Shutter speed 1\250
Appeture f7.1
ISO 100
Mode Manual
Centre metering
PS
Heavy crop
Rawshooter adjustments
Exsposure compensation -0.35, Shadow contrast +23, Highlight contrast -47, Sharpness +50 Detail Extrction +50
Small adjustment on the curves and that's about it...