Dat form. 335x1, which is about 90% 1RM.
Heres a pic of 315x1 from a slightly different, but bad, angle:
http://i.imgur.com/bKmJxlD.pngIll post the vid tomorrow. It LOOKS like i have a butt wink in the vid, but thats because my back goes from arched to straight. It never actually rounds. The screenshot ^ shows me at the very bottom of the hole, where my back is straight. From this angle it looks like my knees may be caving in but they are actually tracking slightly outside my toes.
Ill update my workout tomorrow.
PS - I can barely touch my toes. I really dont think getting to ATG with a straight back is about the hamstrings.