I had a bit of a gap in the centre of one of my shins, I applied some heat to both sides and then pushed the two pieces together which closed the gap, just hold until it cools. I used the velcro, was a nicer look for me, make sure you leave enough cover strip to glue the Velcro too, I glued 10mm of the cover strip to one side of the calve and left 15mm for the velcro. Just a tip, before applying glue rough up the surface with some course sandpaper, will give a better hold for the velcro