Here is the new sub-panel installed using 3/4″ EMT conduit.
A 3/4″ EMT bender was used to bend the conduit to fit into place. Pre-bent conduit elbows and offset fittings are available for some sizes of electrical conduit.
Note the 4 11/16″ square junction boxes mounted on the ceiling. By mounting the junction boxes there, it made it very easy to remove cables out of the existing GE main circuit breaker panel and bring those circuits into the new GE sub-panel.