Two aspects of your post make it a pleasurable read as far as I am concerned. The first is the subject matter, which brings me happy memories. The second is the tritina
itself, a subject about which I know next to nothing, apart from having some vague notions of repeating end-of-line words of the first tercet in certain predetermined sequence in each line of the following tercets, but I find the form attractive.
I note that in your post there are minor deviations from “hands", "mornings", and "cross” in the two subsequent tercets - (poetic licence?). I am curious, are there rules regarding how much adherence is required to line-endings of first tercet?
I am also puzzled by the concluding words of the final line. I like the inclusion of the word “time” (because it brings in a further dimension,
and that is nice) but what is the function of the five final words? Is the need for them technical?