I completed the door sills and began working on the Doors and hinge points. I made a template as per the instructions, out of plywood. I set the pre formed door tubing aroud the template and realized that they are not the same shape. The preformed tubing is not perfectly formed to the opening and I will need to pick up a tube / pipe bender to correct. I am using bubble doors so I need to try and understand which of the instructions I need to pay attention to.