Lol.
Well, after one stuck drill bit (I bought a couple, just in case, anyway), and one Dynabolt casualty (the missus had a few spares), the pier went in on Saturday afternoon.
Thank you, so much, to Lewis, for coming round with his drill and doing the hard work. Hope you didn't get into too much trouble with the missus!
I used Selley's sealant and siliconed the base of the pier to the slab to hopefully make it watertight.
Now, who can drill some holes in a rat cage pier plate (hard steel) for me, so that the pier head (G-11) will fit into it?
H