The comments here and elsewhere are not complete in any way. I am using these comments to sort and aggregate some of the information. More information will be arrived at later, as we continue with the texts of other important tablets.

Also in the discussion part I will continue with comments regarding the Keiti year.

So, what about the connections between this period in Keiti and the texts in Mamari and Small Santiago / London?

As already mentioned the text in Mamari continues in parallel with period no. 7 in Keiti. But later in the Mamari text a partly parallel sequence (I am quite certain and will 'prove' it gradually):

Cb3-21 Cb3-22 Cb4-1 Cb4-2
 
Eb4-40 Eb4-41 Eb4-42  

There is also a similar sequence earlier in the Keiti text.

I believe that in Small Santiago / London we should regard period no. 24 as a text which treats the same subject. I.e. we have to also think of those glyphs in the Mamari and Keiti texts which we already have discussed.