Oh yeah, it's time to get serious with it now. What happened to the chalk and the over/under if needed.
On 315 looked excellent. On 335 you lumbar was rounding out a bit but you had good control of the weight. You didn't really start with a good enough arch though so that's probably why. Just watch it in future and get the chest and shoulders up....I dont mean change your angle I mean just exxagerate poking your chest up....you know what I mean
Good job.