Bob Moog and the RD Artist (RD-77) Bass

This interesting image shows Robert Moog working on the RD-77, and is taken from the 1978 Norlin Artists Perspectives flyer, and came with the accompanying text...

With the ghost of Orville Gibson looking over his shoulder... Bob Moog dips his designer's hands into the second generation Gibson active electronics guitar the Gibson RD-77... already in use by the Who's John Entwistle recording in the United Kingdom... The RD-77 shows more Moog technology blended with Gibson tradition...

One interesting feature of the guitar he is working on is the bolt-on neck. Was this just the simplest way to create a test bass, or something that was actually considered for the RD? According to one member of the design team, Chuck Burge, the RD series was initially planned to have a bolt-on neck, and idea dropped before the bass went into production.