I'm finally getting around to updating that article. I had an accident that just about did me in, so I haven't been doing much the past couple of years.
I concur about not messing with placing the autopilot directly below the wing. There are so many peripherals that you can move around to get the CG correct that it's not a big deal. Also, I have noticed in my latest build that the code handles vibrations soooo much better than two years ago. I would stick it with some good servo tape and forget it. I used to like 3M outdoor mounting tape, as it works really well for all of my heli builds, but it does have one flaw: it tends to let go when it gets cold. That's scary!
Lastly, if you're interested, I can post my motor/prop/battery combo. You won't believe it, but I got my Bixler 1.1 up to 80 minute flights at 12 m/s. I would finally get bored and watch a movie while it circled around overhead for an hour and a half.