Staff merge // unmerge

Hi Peoples, - much frustration & confusion wrt stave merging & unmerging...

Please refer to "Sample Explode - Implode" attached; -

Explode:
p3 (end bar, lower system) "S" stave splits to S.I & S.2 on 1st bar p4... divergent arrows req. on final bar (p3) & continued to show relevant unmerge on 1st bar of p4.

Implode:
p3 (end bar, lower system) "T" and "B" staves combine to "T&B" on 1st bar p4... convergent arrows req. on final bar (p3) & continued to show relevant merge on 1st bar of p4.

... I believe the notation is correct in both examples

Please advise, thank you.

Please advise, thank you,
John