Help tips fpr 270° splits

This is my oversplits, does anyone knows how i can go more further and hit 270° splits or also known as right angle splits well it this point i feel something in front side hamstrings or thigh

This is my oversplits, does anyone knows how i can go more further and hit 270° splits or also known as right angle splits well it this point i feel something in front side hamstrings or thigh