Wow, thanks very much for that, Frank_The_Tank! That's incredible.
I play about with Flight Simulator, and starting to learn about the FMC. Things must get pretty busy when things change, like that. Everything all planned and then a massive change like that.
Amazing how you mentioned SINNK. In X-Plane, I use SINNK as the waypoint I need to get to to turn to 196 for RW 19. Was pretty nice to hear a real pilot mention that! I see on the FMC, there's a 'HOLD' button. Maybe that's used to 'easily' create a holding racetrack shape on a selected waypoint?
I divert. Sorry.
Thanks again for that response.