Well, the good thing about you welding the diffs is that you live too far away and I won't be running any trails with you.
I know it's cheap, but so are lunchbox lockers. I've seen so many problems with welded diffs on stock axles that I recommend staying away from them. It will be a problem on the front in a number of ways, and you won't always be able to disconnect the front with your cable because it will have too much bind on the axle sometimes, especially in tight spots when you want to turn. Any automatic locker makes it harder to turn, but they do allow for some differentiation, meaning one tire can spin ahead of the other in a turn relieving some of the pressure.
You didn't say what rear end you're running. If it's a D35, that is nothing more than an accident waiting to happen, I've seen it many times. Besides, I still don't get what anyone gains by welding the rear end on a rig that will see street duty. Over a not very long time, the excess wear on the tires will amount to more expense than the cost of an inexpensive lunchbox locker, so saving money by welding the diff is not a reality.
Unlike a spool, an automatic locker does not increase tire wear because it allows for full differentiation in the turns, hooking up to only one axle at a time in a turn. This is what gives the auto locker it's handling characteristics.....powering only one axle in a corner. No quircks with a spool because instead of feeling it in the seat of your pants, the tire is just scuffing on the pavement.
Oh well, to each his own, but let me know what trails you'll be running, so I can...............