your grip on the bar is still not quite right - you need to point your hands outwards slightly when you grip the bar then get under it- so hands are resting kind of diagonally on the bar with fat part of thumb in contact with bar- using this grip you don't even need to wrap many fingers over the bar- maybe just 2 and your thumbs will be directly over the bar. On the way down shove knees out harder. Best way to get knees out as far as possible is forget about knees out. Instead think of hips out try to externally rotate your femurs- almost thinking hips side to side as if someone was tugging on either sides of your hip in opposite directions. This will automatically force knees out but at the same time allow you to sit back better and getting a better stretch out of the hamstrings. Whereas just thinking knees out doesn't automatically mean that your knees will force out their farthest- sometimes they may come out hard other times not so (hit and miss). Your knees need to be anchored in place 1/3 of the way down so I think thinking hips out will help you in achieving this. Also see a related post by blowpanis who also talks about this http://startingstrength.com/resource...p/t-20724.html