Ohhh...thanks Wolfie. My code addresses hanging IN or OUT punches but not in this manner. I'll have a play.
The data set I posted up includes your extras and a few of my own.
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden