Bringing back a really old thread...Here you go:
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So you need 2 g-hooks and 2 female ITW buckles from Exo. I get my g-hooks from milspec monkey, you can either use the normal or the wave. For the Exo buckles you will have to e-mail Steve or Lenny @ Exo. I recommend getting a couple extra male and female buckles while you're at it in case you add more stuff in the future. They won't charge you much and they'll get them shipped out pretty fast.
If you have any other questions let me know...
I am trying to figure out how you attached the SR buckle at the top of the pack. It looks like there is some webbing zip-tied up there. Did you sew it to the top fabric?

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