Thanks all - really appreciate the comments.
I thought about removing the paddock numbers from the back of the shot, but decided that they were relevant to the story of the image.
I have printed this as an 8x8 and mounted it with a black mount, with an ivory 45 degree bevel,then framed in a brushed platinum
1" 1/2 frame. Mounted like this the front wing detail is visible, without reducing the vignet ...
Pete