Well, I just got my drop spindles from Magnumforce. First impression is nice job! Well packed and includes a very nice disclaimer of warranty. The 11.75 slider caliper adapters fit, the dust shields do not fit. The spindles height is the same as a stock e-boby spindle. You need special bolts (included) to mount the lower balljoint.
Overall, I'm happy so far. The only surprise was the dust shield not fitting, but it makes sense since they had to move stuff to get the drop.
I get my cross drilled slotted rotors Monday and I'll see how they fit.