Shortly after my first post, my friend left to fly the five miles home. If he had gone straight there, he wouldn't have had such an adventure, but being Canada Day, he decided to fly at 1000' AGL down the main street of the nearby town of Black Diamond.
While doing so, the engine coughed and a diversion back to the glider field was initiated. The engine then completely quit and he landed in a hay field less than a mile from the glider field.
The failure was due to a fatigue crack in the fuel feed pipe, just below the fuel shutoff valve at the base of the tank. A call to a friend resulted in the delivery of various pipe fittings and a "field" repair was carried out.
By now the crosswind at the home field was out of limits, so the Tiger returned to the gliding field, where it was put to bed for the night, as thunder showers bore down on the field.