Preparation

Overfill the hole with silicone, which is easier if something like the label covers the hole on the outside

Make a dome on the inside

Put the saucers upside down on cardboard outside

Spray bottom and sides to seal - two coats

Leave to dry

Drill from the bottom (painted side) as the exit side will chip (this is an early prototype, unpainted)

Placement

• Roughly the width of a tee from the ridge

• Washers should have decent clearance so they sit flat

Drill pilot holes - partial depth to locate the masonry bit is sufficient

Use masonry bit to drill through, slowly, using minimal pressure

Use these holes to mark other saucers