On the g46 I have an idea to cut away the arches from the scimitar floor/bulkhead moulding and attach them to the flip up bonnet, very like the inner front wings on a herald/vitesse bonnet. Just an idea at the moment, not tested yet.
I have saved the metal inner arches from my Herald with the plan to see if I can make them useful under the bonnet. Otherwise, I shall just look for inspiration from other builders on the forum.
Makes sense to use them as an integral bonnet stiffener. And we all need those.