Darryl,I disagree with you on few points.
First,why you personally attack D.Stokes and S.Braude?Where did you take idea that they are charlatans?I don't get it.
In regard materialism/dualism I prefer to keep an open mind,and Alan Gauld,no matter who his is(dualist or whatever) is one of my most respectful persons.Have you read Stephen Braude's "Immortal remains"?It considered to be one of the best books on the topic,and someone regards it as continuation of Alan Gauld's "Mediumship and survival".
You also seem biased.Just because someone comes with materialistic theory,doesn't mean it is true.And it doesn't tak away that wassermann's theory is full of speculations.It's not invention of Stokes that wassermann talks about self-replication of shadow matter body,or shadow matter copies of earth shrinking.
Regarding shadow matter itself,yes,there is no much talk today ,and nobody knows if anything will come in the future