I just put on an Eagle stock pack. To bring the pack up for my cheek weld, I attached velcro strips to the velcro already inside the Eagle. I cut 1" x 4" strips and used the adhesive backing to attach male and a female strips back to back. I added 4 of these combos inside the front of the stock pack and 3 to the inside back of the pack. My cheek weld is now working and the velcro is rock solid for my cheek bone.
I really thought about getting a Karsten or Defensive edge, but I really like the fact that I can store an extra clip, range card and earplugs etc. in the pouch on the stock.