Alan, it was actually the old Rod McLellan Company in the days of Van Ewart which cloned Orchilla. Twyford have not done any work with Paphs to the best of my knowledge, at least recently. Of course in the good old days when Guinness Peat were funding things, all sorts of interesting experimentation was being carried out including early Phalaenopsis cloning. As you say, some basic F1 lines using tetraploid forms of parents will give you heaps of uniform progeny even with Paphs. This is what Floricultura does. They have 300 or so plants of glaucophyllum and delenatii and they reciprocally cross every flower every year to give them their Paph pot plant stock.
Andy Easton
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