Refill one pound propane bottles

How do you actually fill them? I have been following this thread to learn any tricks or things to watch out for. I bought the fitting from HF but have not tried it yet.

OP here. With me it was, why go shopping for something I don't have to, and why have more garbage to throw away. Price was good to compared to buying at store. What I did at the start was simply watch several youtubes videos. First time makes your heart skip a beat when you open the valve. Real easy after you do it a couple of times. From my limited experience: Gloves are a must, (I use my dutch oven gloves (harbor freight welding gloves), the colder the empty bottle the better. I put empty 1 pounder in freezer. If overnight I let it warm up a bit next day before filling. And make sure you put the fitting where you can find it for next time you need it and store in plastic bag. But I have never filled at a campsite with 1 pounder just being chilled in RV freezer at runs temp about 30 degrees and having wife complaining about blowing us up etc. (If your wife is one that gets upset at things like this, wait till she is gone). I watched about 3 vid's and had no problems. I noticed in the vid's that most don't have access to valve from underneath, which I wanted just in case. The first time I did it I placed big bottle between 2 picnic table benches so I would have more access to valve from underneath. And did it where I knew there was nothing spark wise or anything elec going on. My thinking was..So if anything goes wrong I would have more access to valve to shut off. Remember your access hole is plugged up by the 1 pound bottle on a regular flat surface and finger are clumsy with gloves on. That is my reason for getting access from the bottom. I don't refill till bottle is completely empty.