Please help settings Container and right Sidebar width

Hi,
<off topic> Happy New Year! </off topic>

Please I'm setting the Container and right Sidebar of a website but I can't find the right settings. I have one container and only one right sidebar, separated containers.

What I want to do
I want a total Container width of 1070 px. I changed this number on Customize > Layout > Container width > 1070.

Exactly, I want this settings: 40+730+40+20+40+160+40. TOT 1070.
(40 is the content padding, 730 the body content, 20 the separating space, 160 the internal size of the sidebar).

But when I go to Customize > Layout > Sidebars > Right Sidebar Width, I can only chose a fixed % number. I tried 20%, 25% and 30% but I get not good results (too big sizes or too small).

Is there a way to get exactly that sizes?
Here the site:
http://www.dietasparaadelgazar3.com/

Thanks