This spreadsheet is available as viewer only. To have access to your own copy, simply:

File > Make a Copy

Fill in column P with your stage ending time during your run.

Fill in column I with your PB stage timings.

https://docs.google.com/spreadsheets/d/1Jn15xRu88AdxuoVb-yxifsn58_I-6Un9IiLGvuoU0Ro/edit?usp=sharing