I considering purchasing a Koplin weighted STA for my OMS IQ PAK. My current OMS STA works fine, I'd figured it would be an easy way to remove a few pounds from my weight harness to the rear of my rig. The Koplin STA is a couple inches shorter than the OMS STA, and it appears to have three tank band slots giving it a little more flexibility with band placement. I'd be interested in any comments from anyone who is using the Koplin STA on their OMS rig.