is one piece episode 320 filler?

Construction continues on the Straw Hat Pirates' new ship as the sun sets. Although having the help of Yokozuna, Paulie, Lulu, and Tilestone, Iceburg and Franky are doing the bulk of the work: surprising everyone else with their seemingly boundless energy.

Even well into the night, the Dock 1 shipwrights are amazed at the "gusto" being displayed by their boss and his "bro" and realize that Tom's Workers still live on in these two incredible shipwrights. As they continue to work, Iceburg has a chuckle.