Work, work, work
Have been concentrating on calliope #4, now that #3 has validated the concept. Many photos now.
Photo #1 Fixture to accurately align bushings to manifold prior to welding
Photo #2 Attaching solenoids to welded manifold bushings
Photo #3 Pressure testing manifold and bushing welds
Photo #4 Spot facing flats before drilling air passages in foot
Photo #5 Drilling passages