How to fit a modern Ikea sink into 50-year old cabinetry

So this is the sink we're putting into the kitchen:

The sink.

And this is part of the instructions for installing the sink:

The instructions.

Needless to say, the nice-and-neat instructions provided were going to prove rather unhelpful with a kitchen like this. So what to do, you say? Make an animated gif! That will solve everything.

Wipe hands on pants, this part of the job is done.