I was down at a local shop on Saturday looking for some tubes for the Little Delights. Usually when I go in there, its a two-three trip, hanging out, talking tubes, all that good stuff. The shop owner and myself got to talking about the new preamp I purchased last week (SP12 from tubes4hifi). He pointed out that it appears that the designer had cascaded the 12au7, he had believed that the only tube that should have been cascaded is the 6dj8. Could someone confirm this? If this is true, (I will ask the designer) why would one design a topology to do something that the tube isn't designed for?