I have already been considering this. I might have to give it a go. The one I have is large; the person who owned her before me seems to have been a big fella; added risers to the handlebar and a larger windscreen. I'm just over 6' and I'm more of long body and short legs, but the windscreen is exactly where my eyes are so I have to struggle to look above it.
I found using a many tooth sabre saw blade made for laminates make the smoothest cuts. When finished, sand edge with fine sandpaper wrapped around a board or sanding block.
I just saw your post inquiring about my having a windscreen. I do have a spare if your still interested. It's 25" tall, in good shape. I'm 6'1" and found it to be a bit short.
I would like some chrome pannier rails myself! It has no wheels on it as I sent them out to be chromed & the chrome wheels are now on the bike at the right side of the photo. And note, I have more than what is shown.