The design process started by creating a large cylinder as my base of the sit n spin with the dimensions as height segments: 1, cap segments: 13, and the sides: 49.
I then made a clone and resized it, but kept the original dimensions. Selected both cylinders and created them to be an editable poly's.
Still selected, I then deleted the necessary area in the middle and deleted them. Then go to the edge selection mode and select the edges of the cylinder and bridge them.