Great job! I like the versatility of the carrier. That is something that I am trying to do with mine.
My carrier started off similar to yours. It was an all Pro rear bumper and then I added everything to it. I don't have welding skills, so I had a fab shop, Krawltex, do the work. This is what we came up with, copied from my build thread:
The bumper started out life as a stock All Pro rear bumper with the fill plates and the All pro receiver hitch. I liked the idea that the hitch is tow rated, but it does hang down lower than the bumper. Now that the tire is on the carrier, I could have a receiver fabbed up that I could access through the license plate, but for what I do, its not needed.
I don't weld, but I am trying to learn. That means that I have a welder sitting in my garage, waiting for me to start experimenting. For this project, I had Krawltex in north Austin do the work.
Cam, the owner, has done some amazing work on my other truck as well as the tundra coils on the Tacoma. I bought the tire carrier arm on here from Brushhogger. Here's a link to the classified:
http://www.expeditionportal.com/forum/threads/78493-Swingaway-tire-carrier-for-rear-bumper?highlight=tire
The spindle and latch are from 4x4 Labs. The spindle was the biggest one that Cam knew of, and people seem to like them. It's probably overkill, but I would rather overbuild than underbuild.
We also installed that catch pin to hold it open, and as an additional safety if the latch happened to fail. With the design of the bumper, and the arc of the corner tubing, we were only able to put one additional "open" pin hole. If I do leave it open, when camping or working on something, I use a ratchet strap as an additional safety.
Here's the latch. It's made by De Sta Co, and though I purchased it from Luke at 4x4labs, I think you can find them at Grainger supply and Fastenal. It's rated for up to 4000lbs. Once again, overkill, but it's stout and that's what I like. We were going to go with a screw in type system, but that would have gotten old real fast.
Here's another shot of the carrier with the cans and the bike rack:
The can carrier is not quite centered. That will probably be my first welding project. One of the legs needs to be slightly higher. Oh well. I'm trying to decide how I want to carry propane. I bought an attachment to carry a 20lb bottle and put that at the back corner of the bed. We don't sleep with it in the truck, and there are enough gaps in the tailgate that the propane should vent out, if there was a leak.
Going forward, I might buy a lite weight propane tank and carry that in the basket with firewood, attach one gas can carrier to the front of the basket, and store water at the front of the cab with a manual pump.