Nice.
Did you do anything special to make sure the brake backing brackets were all squared up and in the right place? Many people find this to be daunting, and you made it look easy. Perhaps others could benefit from a bit more detail about this stage, or was it just as easy as it seems?
Any concern about heat from welding getting to the rubber "spring" bond? The trailing arms look beefy enough to dissipate the heat, but wrapping the axle housing in this area with a wet towel would easily provide added insurance.