I have the LX665 50 hp. I was stunned the first time I pulled the foam filled tire and tried to pick it up. Got out the scale and to my surprise 210 lbs each. Question i have is if I add tracks to the tune of another 800 or 1000 pounds will this really stress the drive train. I have to do something cause when I run in moderate soil I just sink and bury the machine . It is really flustrating. I know the tracks are great but dont want to kill the bearings and motor. Any body know what NH recommends.