I decided to re-attach it a different way to how it was originally mounted. Why not make use of my large carbon fibre boom?
I made these hooks (3 in total) from liteply:
That, when laminated together, were epoxied to the back of the dowel plate, which in turn encased the carbon boom :
Left overnight to dry, cracks were Tite-Bonded, then filled with epoxy this morning. A little bit of the red spot filler, and a quick test fit. Job done.