He made his banisters using PVC Pipe with PVC Bendit
We just posted a video on our website and YouTube showing how Joseph Steinberger built 3 banisters out of PVC pipe. In this video you'll see the PVC Bendit is inserted into PVC Pipe and when it got warm and soft they placed the 20' section on their form to achieve the shape and style they desired.
Joseph used both metal pipe and flexible metal conduit inside the PVC Pipe for additional strength and stability. He had special attachments made to secure the Banisters to his stair case.
In my opinion this was a novel way to achieve the bends needed in this project. If you have a similar need Joseph let me know he would be happy to assist. Just send us an email with your contact info and we will forward it to Joseph.