Curved workpieces can make a project more challenging to build But the back of the Swing and also the seat are curved

Victorian Curved Porch Swing Arms

As the design of this porch swing was progressing, there were a couple elements I particularly liked. The arched back gives the swing a graceful look, almost like an English garden bench. it also makes the swing more of a challenge to build. Just as important as appearance, I wanted the swing to be strong. I've seen some swings that are suspended entirely by the arms. But this one is held up by bolts through a pair of rails under the seat, see photo above. The seat slats are strengthened by...