i was there in 1603 when the last craft landed. unfortunatley due to poor maintainance the stones so lovingly carved with interlocking lintels and mortice and tonon joints to support the weight collapsed and the site was abandoned in favour of a site still maintained below the north sea. to hide the use of the site the aliens re arranged some of the stones to resemble a primitive granary and to confuse matters also incorporated alignments with the midsummer and winter solstices. they then sent one of their kind forward in time with a theory aimed at keeping up the deceit.
seriously though i respect your courage in putting forward this theory and intend no disrespect but i still find the whole thing very silly and very much doubt your theory will stand the test of time and will fall by the wayside along with all the other alternative (and silly ) theories put forward over the years no matter what "evidence" you offer.. sorry.