I have an 8x4 trailer with 3.5 foot tall sides. It is a strong triler but recently I have noticed that the springs are getting weak. I would like to upgrade the springs and axles so as to increase the payload and work with new bearings. I am trying to decide whether to go with a 2000 lbs axle/spring assembly or to jump to the 3500 lbs axle/spring assembly. The vehicle doing the towing is a Ford Escape with a 3500 lbs tow rating. I figure the trailer could hold 8x4x2= 64 square feet of wood- at the most. That would be .5 cords. Using this calculator on the net, http://www.csgnetwork.com/logweight.html, That would equal 2550 lbs. Very close to the 2000 lbs capacity. There is a rather big money difference between the 2000 and 3500 lbs axle/spring combos. Do you think I will be alright with the 2000 lbs axle\springs?