I ordered a similar mount years ago & used for my 55" plasma. Like Voi, I had an issue with the tilt feature actually working as designed. It was either fully tilted or straight up and down. In my case I had the TV mounted high enough I preferred the full tilt, although it was minimal really.
Never tried using metal zip ties, so I can't comment on that one. Also for me, getting my hand back there to make any adjustments was a pain. Maybe my paw is just too big but it seemed kind of stupid to me to make a unit you could adjust but couldn't really access to adjust.
FYI, prior to hanging my plasma, I originally purchased the hanger for an older LCD (early model when LCD's weren't very thin & heavy). When mounting the brackets to the TV I guess the screw was too long as I hit a metal piece inside the TV when screwing it together. The TV didn't work afterwards. Took to a repair shop and got fixed, but it always had quirky electrical issues after that (turn on/off by itself, input selections randomly appear, etc).
I never tried mounting that TV again and chalked it up to the TV being poorly designed to really accept a universal mount. Still when I was preparing to mount to the plasma I was very careful in pre-screwing the unit softly by hand and ensuring I had the proper length of screw before starting.
All that being said, the unit I had was rock solid and held my plasma for several years. It was a good bang for the buck despite the (flawed) tilt feature.