This may be a silly question. I have been using an old steel welded rowing frame and finally decided it was time to build a more "modern" set up. I will be using standard 1 5/8 aluminum pipe with Hollaender fittings. Has anyone with a setup like this ever had any issues with their captain's seat twisting during aggressive rowing, either the seat mount itself or the pipe it is mounted on? I am trying to decide if I need to cope the pipe to prevent ill-timed movements.