SEATING THE BRIDGE...

...of a mandolin.

I smarm the table with oil pastel which has no effect on the varnish. Then I rub the bridge across the oil pastel - next I carve off the blue bits under the bridge.

Repeat ad nauseam to get a perfect fit - patience is the virtue...

Which Johanna Konta showed in beating N°2 seed, Simona Halep of Roumania into the Wimbledon semi-finals