How to take the soy skins away?

Hi.

Thanks for your advices. They helped me a lot.

Now, I'm looking for a way to take the soy skins away.

I already have a configuration of the machine; it's like the destoner, but with another sieve for the sand. How could I do for the skins. I've 2 solutions:

a ventilator at the bottom of the machine; it will blow the skins towards a bag

a vacuum system.

What do you think of my solutions?

Do you have other ways?

they must be the least expensive.