People often ask me, “John, how hard is that? Could I do it myself?” And the answer is often, “It depends.” A walk in the park for one person might be a Grand Master Sudoku puzzle for another. Take my friend Jon. He’s like Rain Man when it comes to working with engines or motors or pretty much anything mechanical. But when it comes to installing a new A/V component or programming his Harmony, he’s all thumbs, so he calls me.