Look through the index of postd here. a few pages back there is a Convoy L2/L6 mod’s post.
There’s a few in there with instructions.

When you’ve done it.
You can jump on a plane. Straight through NY to Brisbane, and do mine.
I’ll take you for a fish on the reef up here.

Chuckle.

Trouble is. after coming here you most probably won’t want to go back.
Unless you a city (yuk) person.