I am getting close to doing this re-plumbing job that has been on my list for a couple of years now. A few rolls of AquaPex and a bunch of fittings should be here today. I have the Milwaukee ProPex tool on order. Let's talk washing machine boxes. I have seen the Sioux Chief Ox-Box recommended. It is available in a few termination styles - one of them being F1807 Pex. Soooo, some questions: 1. I am assuming that the ProPex rings will not provide anywhere near enough pressure on an F18097 fitting (0.492" ProPex expansion fitting size vs 0.406" F1807 size). correct? 2. I have a Sharkbite crimper and copper rings that I got to terminate some pex of unknown origin. Sharkbite (Cash Acme) claims that the tool and rings meet F1807 standards. Do you know of any issues using AquaPex (Pex-A) with ordinary copper crimp rings? 3. Is it worth it to get the Ox-Box with the built in mini-arrestors?