my vinyl tonneau cover has arrived; no holes are pre-punched; in the cool of the evening it hardly stretches enough to reach its waiting pins on my TR4. In the sun I bet it stretches a little, but still, it looks like I need to get the snaps as close to the tonneau's edges as possible. Do you folks advise attaching these shaps half over that extra lap of vinyl with out touching the stitching? Thanks! <font color="black"> </font> <font color="black"> </font>