Von Im worried about your jab, so heres a little thing you can do to help it get perfect or nearly.Stand in a corner with your leed shoulder against the wall and your back shoulder 5 ins off the other wall. now throw a jab along the wall keeping the shoulder against it and as you do drive the other shoulder into the back wall as you throw the jab. now you know where the back shoulder hit the walltape a handpad to it otherwise youll get a painfull shoulder. Make certain when you throw the jab the shoulder hits the chin, have fun.