Despite a poor mount (see images) we managed to nail out 2520MHz in 2-way SLi on the Galax 1080 TI cards to take the rest of the 3DMark 2-way SLi records we didn't have
7980XE at 5.8GHz+
2x Galax 1080 TI Hall of Fame
4x G.Skill 2500 MHz Trident-Z
Asus Rampage Apex X299
3x Corsair 1500w
This was alot of fun and worked really well for us. Unfortunately we didn't have good mounts on the GPUs so couldn't try 2600+, but it was enough to take all the records regardless.
I've also got one for you here Greg, after winning the $500USD prize you put up, I felt like I owed you a proper 2-way Firestrike, here it is mate, 50k breached!