Good morning folks, after I've finally got my bum into gear and looked up how to upload images I'll give it a try: to keep the bonnet sliding forward I just stuck a piece of wood with doublesided adhesive tape at the back of the nose cowl like so. Any time I close a bonnet half I move it back not to break off the device.
http://i50.photobucket.com/albums/f343/mise303/bonnet_zpsibvos9yt.jpg
Please forgive me if the image doesn't show up

Michael