Well, another fantastic week of scoring zero points. It wouldn't be so bad except for the fact that it was fifty-fifty between Escape Valve/Butterfly Valve and Urban Legend/Arthurian Legend, and I chose the more obscure answers in the hope of picking up bonus points. Never mind, there's always next week !!
May I add my thanks to the others who are praising crofter's 'beyond the call of duty' efforts. Hope your gremlins are banished to whence they came before next weekend.