Honestly your best bet would be to get a jetpack harness. They are light weight and distribute the weight perfectly. It's like you aren't even wearing a pack. They are pricey but you will NOT be sorry. Anything else will just have you wanting a better system to hook it up to. Here are two links one is for Kcr7pr's aluminum harness and the other is for toolguy301's 3D printed harness. Good luck.