Measurements for studs are as follows in relation to first photo…
Taking the tenax fastener as a datum point, nearest turnbucle centre is 167mmm, next turnbuckle centre is 126mm and third turnbuckle centre is 126mm.
Regarding the press studs… six in total, three either side of centre zip. Taking the measurements from the centre of the tonneau, the measurements are…First press stud 240mm, next press stud centre 227mm, last press stud centre 110mm.