Getting the repeating group in the right size

Hi,

I cannot figure it out.
My goal is for the repeating group to always use, but not exceed the full heigth of the page, and obeying the padding of group A.
This is my last attempt (I made a blank page just to try).

Page settings:

Group settings:

Repeating group settings:

So, the repeating group could never go higher than the screen, right? And would obey the padding of group A, right?
WRONG:

By the way, this is the result when I use Fixed as page layout, instead of Column. Also not the desired result, because it does not use the full heigth:

Slight bump here.
I have watched several tutorials, but still don’t know how to do it. Can anyone help?