When we did the scoop for my gze we had to cut the center support out... But basically after the hole was cut the bonnet was quite flimsy, so we used sikaflex around the bracing of the hole and also reattached the frame to the skin where the original adhesive had come off...
This made it quite rigid again, then the scoop was bolted on... unfortunately making it rigid made it dip in the center so it looks a bit shite, but meh, not buying a new bonnet and scoop for a looong time