gronbog, I'll go ahead and respond here since it is short and sweet. The strategy which I used was just one of many excellent strategies advanced by Ken Smith over the years. The article, "Doubling for Less, a Powerful Tournament Strategy" covers a situation where an opponent has both the high and low on you and bets after you. A full double by you only delays the inevitable, assuming the opponent is also able to double. However, by doubling for just enough to take the high on the opponents single bet win, that forces the opponent to either (1) split a pair thus making a full second bet (losing the low and possibly the high) or (2) if not a pair, match your 'double for less' and hope to draw a good card. Surprisingly, instead of matching your 'double for less', most opponents simply make a full doubling bet without thinking, again losing the low (and also the high if you get a half-swing in your favor).
Thanks Ken!!