Earlier this year I had my dealer install the BTS update to my 60" 2006 Triton deck - so I thought. This is my first commercial mower and I am inexperienced with what the performance is supposed to be like. I wasn't really having any problems, but I knew the updates were out there and thought, "They must make the mower better." Since having it installed, I felt like I lost a lot of power. I also started leaving a strip in thick grass that I didn't ever remember leaving before. I talked to my dealer about undoing the BTS upgrade and going back to the original set up. He told me that the upgrade he did on my deck was just changing out an idler pully and had nothing to do with the BTS. I was confused and asked him what did the change in the idler do for the machine. He just said it increased the tension on the belts. Now, in my mind I'm thinking - how many updates do they have for this deck? Or, does he not know what he is talking about. Can anyone explain to me exactly what updates there are for the '06 triton deck and what they do to increase performance?