It's a tradeoff really, do you have the constant need for more powered tires? Can you put up with the chirp/bark/scrubbing of tires at low speeds on dry pavement? Can you afford to put a set of tires on every year? If you answered yes to these three questions, go for it. It's not really that big of a deal really. On my dads ranger, I welded just the spiders to the side gears, and it's held up to 33 swampers and my dads lead foot. This way if you don't like it , you can spring for a lockright, and not need a new carrier. On another I welded up, I welded everything to everything, spiders to sides to carrier, this one is under a friends 2wd ranger, and he drives alot of miles everyday on that truck with no complaints. The key is a nice penetrating weld.