Check out this great build that was recently shared as a review on the T Connector
"I used the Makerpipe fittings to build a Rack for my pickup truck that would fit over my Softopper. It was a handy option because I could build it without buying a welder, or the clamps needed to weld such a configuration. The fittings are convenient to work with. I would forget about using a pipe cutter: Too slow. Just throw a good medium metal blade in your scroll saw. Another advantage over welding is that I can reconfigure the design if I find it needs to be modified in any way. I also built it "in place" over the Softopper, which I allowed for proof of concept/ better fitment. With welding, I would not have been able to do that because I would burn the canvas topper, obviously. If I really get serious about permanence or structural strength, I really could have my bass player weld the fittings, but they are very strong as is. I can haul my 135lb 1436 Jon Boat on the top of my Ranger with great confidence. The convenience is worth the price in my opinion."
"I used the Makerpipe fittings to build a Rack for my pickup truck that would fit over my Softopper. It was a handy option because I could build it without buying a welder, or the clamps needed to weld such a configuration. The fittings are convenient to work with. I would forget about using a pipe cutter: Too slow. Just throw a good medium metal blade in your scroll saw. Another advantage over welding is that I can reconfigure the design if I find it needs to be modified in any way. I also built it "in place" over the Softopper, which I allowed for proof of concept/ better fitment. With welding, I would not have been able to do that because I would burn the canvas topper, obviously. If I really get serious about permanence or structural strength, I really could have my bass player weld the fittings, but they are very strong as is. I can haul my 135lb 1436 Jon Boat on the top of my Ranger with great confidence. The convenience is worth the price in my opinion."