any tips for training my freestanding HSPU

These are my beginner HSPU. Any tips on training for it?

3MxIGT8

http://www.youtube.com/watch?v=mjs-3MxIGT8

Squeeze your butt as you are arching your spine. This is also because your ears are sticking out and shoulders have an angle.

Have you tried pressing out of a Headstand to Handstand and then lowering back down?

It is still a decent work in progress.