Looks great!
I'm just in the process of lowering mine a bit as it was sitting far too high! I've just fitted +60mm Dobinsons coils on the back and will be doing the front next.
I've been thinking about 3 linking my rear like you have and my only concern is that the trailing arm brackets on the axle are obviously designed to be bolted to the trailing arm in 2 places and will the brackets hold up to just being bolted in one place.
I'm guessing you havent had any problems?
But if I do another big trip like my Simpson Desert one will they hold up to thousands of k's of corrugations.
The corrugations are so hard on vehicles, cracked chassis's arnt uncommon.