sorry canít see the pix
per my drawing 44, I got rough dimensions for the top (section A-A)
and bottom (section Y-Y). The top, other than the minimum edge distance for those rivets, is probably up to you, although the drawing shows it just covering the canopy frame tube, which is what I did and think looks ok.
On mine, the bottom does closely line up with the edge of the forward top skin, although you will be spending a fair amount of time on that windscreen fairing, which will mate with it in a manner of your choosing.