JJ, I am not sure about the recommendation to turn base to final at 150 feet over the threshold from the following reasons:
1- it requires a very low base to final in a turbulent area if you want to be able to make the turn off.
2- it is hard to judge that you are indeed not slightly past the cliff. The problem is that slightly past the cliff is the absolutely worst place to do your base to final since this is the area with the strongest sink. It is a narrow area, exactly where you would expect to find ridge lift if the wind was from opposite direction.
So my preference normally is to do my base a little further downwind where I don't expect to find sink, and do a high steep final with nearly full spoilers and extra 10 knots for energy, so hopefully I am high enough over the threshold not to hit the sink, and if I do, hopefully closing the spoilers and the extra energy will overcome the sink effect on the glide. There shouldn't be much sink at more than twice the cliff heights, say 200 feet above.

I just posted the above to the soartruckee yahoo group where I think this should be discussed further. Please join the discussion there.

Ramy