Thanks for the nice note, torger. I think others have done this (the thread you quoted) so you should be able to true the thing after some fashion, especially with a reinforced deep section CF rim.

Normally tandems get MORE spokes though, not less! Older tandems have 40 spokes. But I'm a big (>110kg) guy - you may be 50kg, or this may be a tandem for junior racers or something. Orthodox thinking would be a 40 hole rear and 36 hole front would be appropriate. Or a 36 hole rear and a 32 spoke front in a 40 hole hub:. But you clearly have reasons (aero rim, spoke drag) for going with fewer spokes.

Anyway, for your amusement: