Good info! I have to say sadly I am not surprised his steering box broke... When I spoke with him, he had just done the Sky 3F springs up front.
I have the same setup - Skys 3F front springs and had some clearance issues. I saw he still had a drop pitman arm, which, on my set up would have absolutely crashed into the springs. I went flat pitman and still had to cut the little keeper bracket off the front of the springs because that would contact the pitman at stuff. If this wasn't addressed, it'd break your steering box for sure.
Another issue is that my drag link would contact the springs when steering driver and drooping passender/stuffing driver wheel. It would create a serious leverage point and would either tear the tire rod end due to tension OR break the sector shaft/box bearings from the bending placed on it if unaddressed. Pics below. I fixed this by making a collar and plate on the leaf keeper bracket (whatever that's called) that limits the springs bend earlier. This gave just the hair of clearance needed so the drag link didn't become a massive lever bar.
When I was talking to Andrew as he was in line for tech he said they just finished that rig, and he seemed super tired. I feel for him, as I know how hammering to get just my recreational wheeler ready for KOH week was. I can't imagine race team level of prep.
Those are my speculations to the failure. I could be totally wrong, but they would have taken my similar rig out if I hadn't fixed it before heading down to wheel.
I think I have more pics of it on my instadouche @gnarlyduderino