Stack The Bend links multiple Bend deformers in a chain inside Cinema 4D. Apply the plugin's tag next to the bend you want to concatenate to the previous one in the hierarchy, and the connection is made.
Beyond Bend, the tool also stacks Twist, Bulge, and Taper deformers. When the deformer you want to reference isn't the previous one in the hierarchy, you can pick a different one by dragging it into the user data link on the tag.
Built by Gianni Lorusso, Stack The Bend runs across a broad range of Cinema 4D releases, from R19 through 2024, including R20, R21, S22, R23, S24, R25, and R26. Installation is a matter of copying the Stack-The-Bend folder into your Cinema 4D plugins folder and restarting the app. It's cataloged in the toolfarm library.