Excelent choices form Possum - Definately worth trying to get hold of either from library or if you can afford to buy. They are set out in such a easy to read manner with loads of 'easy to digest' information.
And strangly enough my copy (might be older than Possums) has 21 theorists in which seems to be rig2706's magic number!!!
Mind you I still think researching 21 is excessive - better to do 2-3 thoughly than just skim through loads.
xxx
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