Once the epoxy has hardened, three correctly sized holes are drilled in the epoxy.

These holes were drilled quite carefully using the deck gland as a reference so that they were in the correct place. If I had misaligned one or two of the holes, then I would have simply filled in the errant holes with more epoxy and drilled the correct holes once the epoxy had cured.

I had hoped that the M4 x 16mm bolts would be long enough to do the job, but alas they are too short and I am now await the arrival of M4 x 20mm which should be long enough.