Mat pulled 550x9 off 6 mats yesterday. The weight felt really light and then my back just suddenly gave out on rep 7. Unwrapped and then suddenly realized I must have more in me so I immediately got back down and lifted for a fairly easy single, got on my knees to rest, and then got another single that wasn't too hard. So the rest pauses are back. Looking back 2 years ago I was doing 7 reps rest pauses included so I am definitely stronger now.