This frame is pretty much a normal 7005 aluminum race model with a 44 mm i.d. head tube and a PF-30 bottom bracket.
The thing that will make this one do the job of two frames is an adaptor eccentric that fits into the PF-30 shell. This allows the frame to be run as a single speed without a chain tensioner. The owner of this frame requested the setup. I'm curious to see how it will perform.
This frame has one of my last 7005 NOS US made Easton 40 mm downtubes. By next week I will have used the last one. Time to source something else after all these years. I still have about 70 top tubes. I will not stop building aluminum frames no matter how much the industry markets carbon fiber.