I've been working this problem out myself. So far I have a pretty good feel for it. I use a 1/16 drill bit to put holes into the plastic. Careful though the drill will try to dance a little. After that you start at the back I use a double plug in each of the holes I made. First i put a drop of GEL super glue in the hole, then put in the hair. It keeps it really very snug. After thats done but a bit in the middle hole just like a ponies tail. Don't get too thick though. Then re-root as usual. Seems to take about 2 full hanks to do 1 cam head. Still working out the kinks though. Hope this helps. I'll post pics soon of ones done with this.