i sketched the cut out on the lense cover and kept looking at it to see it it was right, redrawing it and that. Check where you want the cutout to be wont damage the wing mounting points, yes you can cut a lot of it away but not too much, if you want ill put a pic up if you dont get what i mean about the wing mountings.
Just take your time and a dremel type tool made the job very easy.
Once you start yourll realise damn this is easy why didnt i do it months ago lol