I took the plunge and bought a ferris 60''ztr last spring. This machine replaced my exmark 60'' turf tracer. I bought the ferris because it had a really smooth ride and plenty of power. The downside is that i cannot seem to cut nearly as straight a line with it as i can with a walk behind . Yes i have checked the air pressure and many other things with this mower but it still does this. I was supposed to save time with this thing but when i have to slow down, this thing is costing me money. Thinking i might go to a grasshopper simply because of frustration. Yes i tried the exmark lazer and it did not seem any better than the ferris plus the ride was much more harsh. Any suggestions, tips or advice is appreciated.