Not at all.
Actually I also spotted this on the 'double triode' website you mentioned a few days ago and sent it to Frank and co.
@Curbiba is not strictly correct to say that Frank and Harper's Americium tests did not work at all, they calcumated after a couple of tests that they yould need a very large amount of americium to get results equivalent to those they were seeing with a simple co-dep LEC.