If it was a windy day like it was here it just blew away. They are not that heavy and make great frisbees. It is most likely around somewhere and if you went asking someone probably has seen it. Might be bent beyond use though. I know the wind from transporting a 10' solid dish at 40mph are strong enough to lift it out of the truck. Mount,
actuator and all. The shape of the dish just makes it very prone to lift.
By the way your pole should be plumb to avoid major headaches during alignment. Your theory has one large flaw. You will only be able to plumb your mast in one direction. Imagine forward rear tilt. What about side to side? Much easier to just set the pole plumb to begin with.