That looks like one serious case of over kill on the metal thickness - nice.

Ya likely noticed that when turning in the direction of the deck that it misses a spot where the tow behind tracks away from the mower. I generally do the big open spaces up/dn, back/forth or diagonally and then come back for a pass or two along the edges to finish off the turn arounds. Sometimes the other way around just to break up the routine. The only real down side is when ya get in to a small side section. I've got a couple places where it would be a lot more efficient to drop one or both of the tow behinds but of course I don't. Depending on design, they're also great for getting under evergreens.