i personally welded my last one, i used the "garage" route as above with a smaller gas welder, didn't run gussets, but if you fill, turn, fill turn, it allows the heat to evenly spread, even allow for smoke breaks for some cool down in between turns. the turning is not only for cooling, but to keep the diff spinning between welds, it will seize up if you run it too hot, like always, just make sure you have good penetration.....

I'll be using it at CFRC on the 8th, driving down on it, and back, I'll let you know how it goes.