when i use pva bags on any rig,i first put piece of pva  
rig foam in the bag then fill it,as i use quick links i remove 
 the rig,put a stringer needle through the top of the pva bag  
aiming for the pva foam i put in at the bottom,go through  
the foam and out the bottom of the bag,attach the rig pull  
it back through,as the hook pulls up the bottom of the bag  
get the point into the pva rig foam,i do this for few reasons 
when casting it gives you more of an grip in the bag and you 
 can give it a bit more on the cast,and so the hook point 
 doesnt pull into any chopped boillies. 
  
i used helicopter rigs with the above pva method to great effect on my last trip to france,carp to 33 and cats to 42