This is the main plate that has now been resined into place....

The large holes allowed resin to flow through the plate and form a solid plug as such, additional 'grip' on the plate has been done by roughing up the area to be resined with a severe grind.
The pilot holes on the actual board aren't real deep, they are there just to mark where to drill once the resin has cured enough to be worked on.
These pilot holes will be drilled right through and to a 10mm diameter then a hardwood dowel will be resined in.... that should hold it all together nicely