Larrchild obviously hasn't participated here in years. For quite a few years now, the Tube Equipment Corporation site has been reduced to a 'coming soon' showing an SR-71B prototype, and everything else is gone. The original SR-71 always to me seemed to be the best Fairchild 670 clone in both concept and price, beating any reason I'd ever have to build the Drip versions, for instance, once you factor labor. Hope they're still running, or happily retired, whichever. No real trace of him anywhere anymore.