I have to say I am in AWE with Amano sensei. I'm re-reading the whole manga after I took a hiatus somewhere in the middle of Enma's arc, and I just now realized how well planned the arcs are up to the Future Arc (maybe even farther arcs, too, don't know yet), because it's obvious from the comments 20 Years Later Lambo makes that Amano already knew where he was going to take the arcs.
Respect!