Mr Bean, would you mind letting me know what ISO that image was taken at?I am going to hazard a guess - Me thinks >= ISO 8000
From a cropping perspective, this is the original, image. I would have used the 1.4x TC but the light was low as it was (1/125 @ f4.5 ISO 400 - using a tripod as a monopod, one leg extended, as I was moving around and no time for the tripod setup).
What a wonderful picture ! I would only crop it to change the composition slightly. Love the bokeh produced by the 300 @ f4.5. Would make a lovely large print on canvas.