I just got a 2005 Trek 520 in great shape. The fit is fine (seat height, KOP, reach) but I'd like to raise the bar up a few inches. I've heard that 520's were made with short steerer tubes and this is the case here. I've replaced the original stem with a 120mm 55 degree stem and it fits like my road bike. For touring, I'd like the bars to be at least even with the seat so I'm thinking of a stem raiser to gain another +/- two inches. Seems like a sound concept but I'm wondering about durability and functionality. What are your experiences and thoughts? Do you have any suggested brands, or brands to steer clear of? Thank you.