Unfortunelty, it's not that easy to "jus release the packs". I bought a few VF-1Js for their packs but it's quite a task to put them on old valks. Besides the legs, the would have to give a whole new mold for the arm packs or a seperate forearm, then give us a new backpack and backpack/back joint which is a pain to replace. By doing so, you just replaced most of your old valk.....