both are easy to do, but hard to explain on a pc screen.
1, attach your twine coming from your neddle to the last mesh knot on one edge.
2, pass the neddle up through the first mesh on the other net, leaving the same length of twine as mesh requiered and throw a knot (half hitch) as normal but pass the neddle through the loop twice for extra security.
3, now pass the needle back to the other net and repeat the process all the way to the top of the net, working in a zig zag fashion.
to repair a hole its the same princerpal once you have cut out the dammaged meshes.
hope this