More bulkheads on beam

Build hours: 58

Bulkhead C,B and A were added to the beam as described previously and alignment was rechecked on all bulkheads. With the addition of the stringers and siderails, the bulkheads will be ready for skinning - time for another materials order.

The beam for the second fuselage was swapped onto the taller set of sawhorses. The beam center lines and bulkhead positions were marked, bulkhead supports were added and F was attached to the beam end.