I'm wondering how many expedited/hotshot drivers there are on this board. I am considering getting into that line of work and leaning heavily towards the Promaster. I was hoping some drivers can chime in on their experiences or provide any other info such as how much weight y'all go up to, the full 4,000 lbs? I read a thread or two from keep on trucking about needing another motor in his pm and watched a review by a hotshot driver on YouTube and he needed to put another engine in his pm at about 170k something miles. Thanks in advance, Ray.