>>64479374
>eagle h harness and ATAPS
That's a good start, it's much sturdier than a Camelbak.
From what Anon said, integrating the chest components was the hardest part. IIRC he also said the Camelbak was a good choice for light loads but the straps and belt weren't really up to the task.
This is his chest components joined together, I don't remember what they're built on. Maybe side plate bags or cumberbund components?