Still seems awful silly to buy a brand new trailer to max it out. 14,000 x .10 tongue weight is 1,400. 15% is 2100 Most say 10-15% tongue weight. so 11,400 or 12,100 for a machine that weighs 12k without any accessories.Ok let's look at it this way. If you take 14k-4k to get a 10k payload, are the 7k axles actually carrying 7k? I say no, Unless you have 0lbs tongue weight which we all know is not a good situation to be in.