I have done many YD trips with my humble 15 ltr, and pony. There are some heavy breathers on YD that requires twinsets for single dives. Twinsets are often a fashion statement for those people wanting back problems.
As suggested if you are diving the Farnes a twinset is overkill. Two seperate cylinders for a days diving is plenty. [note to self, you have just agreed with Digger
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I have twins because on a typical south coast dive day I like loads of gas for my first dive say 35m, but don't need much for the drift dive.
Ian
Fashion victim
