Have not read back to see who's completed the challenge yet, but I sort of gave this a shot for fun on friday without filming.
Did 17 reps @100kg without pausing, so I think I could do 20.
No grip assists, no belt.
EDIT: Did bother to read back through, and realised it's now running on 1.5xBW.
I'll properly attempt it this week. Pretty sure I weigh about 88 so holy shit I have to pull 132 for reps.