On 04/06/2021 14:27, Suzanne Clarke wrote:
Hi

The screws, which were invisible before, start half way into the plank and then screw into the base. How on earth is that done?

You want a plug cutter, you do. Get a good one, about £15-£20, not some
£9.99 crappy set of four. Don't use it on gritty boards or it will
become k-nackered.