I would like to build a nest swing for my daughter (similar to attached image) but am not sure what I can use as the base ring under the rope. I have considered bending some plumbers copper pipe into a circle and soldering with a straight coupler, then lagging and rope. But not sure this will be strong enough.
And ideas on where I can find a metal ring of around 1.2m diameter off the shelf?
I suppose another option is a sheet of wood and a jigsaw, but not ideal.