With one deformed resin plate already, and a free replacement resin plate waiting to be fitted, I havent bought aluminium solely on cost.
And I have to ask why that plate has so many holes in it? Surely the plate can be drilled for router its being fitted to?
But I have come up with a solution for me thats a bit of a hybrid.
I can make my own aluminium plate quite easily, but the centre inserts cant be done by hand so a really large opening would be required, which is no good for my small box pieces.
So I am picking up today an aluminium plate which i will fit under the resin one.
With the router bolted to the resin plate, I will then cut out the router base shape so that there will be 8mm of alloy and 9mm of resin, but the router will still be as close as it was before to the top. That way there is nowhere for the resin to sag to. The only force downwards is a shear force at the router plates edge. And my makita isnt that heavy!