I'm looking to build a pair of high efficiency speakers from a kit for use with a single-ended triode amp (probably a Bottlehead S.E.X.). Could I have the plans for the Theater 4 Bass Reflex speakers and the Theater 7 corner horns, so that I can figure out a total cost, and how complex they are to build?Also, it would be great to know if in your experience they are SET-friendly. In terms of sensitivity, they look great for SET use. But, other factors (like low, or widely varying impedances) can screw things up.