SCFire, you've been given some great advice by GATC35. I echo everything he said and really want to emphasize the importance of getting those 7,000 lb axles with brakes on at least one axle.
I bought my trailer about four years before buying my TC45D. With the 16LA loader and a boxblade, I am pushing the limits of my trailer with two 3,500 lb axles. Now that my rear tires are loaded, I cannot legally carry the tractor on my trailer. I'll have to sell this trailer and get another one soon. The perfect trailer for your tractor would be as GATC35 described with the addition of trailer brakes.