On my LHT which I bought new with an uncut steerer, I could not get the bars up high enough. Mine is a 26" 54cm model...I replaced the fork because I wanted another 10-15mm of spacers. The uncut steerer on the 54cm showed less steerer than the other sized models; a 56cm LHT came with a steerer that was 50mm longer, you could fit a huge stack of spacers on that one!
I also replaced the stem as suggested by others. The bars are about 1.5-2" above the seat. I have the stock dropbars and am on the hoods 90% of the time. I use the other positions to give myself a break.
What about changing the bars on your LHT to a different type that would move your favorite hand position closer in? Say Jones H-Bar, Trekking bars or something? I don't know enough to tell you about different bars, I use dropbars and am happy with them for now.
What hand position do you use on the Troll mostly?
Jon