I currently have five SA X's (Vintage color) in use. Love them. However, they do require a great deal of adjustment during the first couple hundred miles. I wrote up a little 'experienced user' procedure I use on my seats. If done properly for the early miles they will require far less adjustment later. I have seats with well over 5000 miles on them that still have most of the tension screw threads remaining. The stretching does slow down substantially. Also be aware the more you weigh the more it will probably stretch. I average around 155lbs myself.

Anyone who wants a copy of my adjustment procedure you can view or save a copy of it here.

Don