Handstand Form Critique

I seem to lack mobility in the shoulders but I can still get into a good handstand position (supposedly).

 

My legs here, as far as I remember, were tensed after a few seconds of getting into HS, but it still doesn't look like it. Do I need to be more hollow or something?

 

I'm really not training my handstand balance much because of my inability to get into a good HS position straight away so I have to walk around first to regain the balance, but I'll try to work on it even thought flexibility doesn't seem to improve even a slightest bit.

 

http://www.youtube.com/watch?v=b7QygQ3dyZY

 

Anything else besides balance and the getting into the handstand I should work on?

What about a different entry?

Try lunging, lift your back leg up, and kick up with your front leg only

Not sure if lifting the leg first makes a lot of a difference but I'll give it a shot!

the mobility is not so bad BUT if you want to protract the upper back portion you need more mobility...handstand 1 can be the solution of all your problems