[DD.]

Anywhere along the stalk between the parent & the first plantlet, but the closer the better for tidyness sake.

If you only cut the runner, the parent wll come to no harm.

[Stevens706]

You can just cut the runners off the parent with the stalk and stand then in a jar of water, when they have rooted pot them up, I’ve done this in the past and it works.

[Penfold]

You can just cut the runners off the parent with the stalk and stand then in a jar of water, when they have rooted pot them up, I’ve done this in the past and it works.

Guess what I'll be doing this evening... cheers for the tip.