(7a)

7/4      40/21       7/4
3/2 10/7       3/2   3/2
5/4  5/4  4/3  21/16 5/4
1/1  1/1 10/9  9/8   1/1
               15/16
     5/6  5/6

That's with the minor 6th rooting for the utonal chords.
ii rooted on 9/8 works better with the half-dim7 rooting.

(7b)

7/4      63/32       7/4
3/2 10/7 63/40  3/2  3/2
5/4  5/4 21/16 21/16 5/4
1/1  1/1  9/8   9/8  1/1
               15/16
     5/6