Tug,
I'm not certain what the dimensions you mentioned are about? But looking at my trailer at lunch today, I can say without a doubt it is quite a bit longer than 23 feet overall. The metal portion of the bunk supports are just about flush with the vertical face of transom, and the bow is at least 5 feet aft of the ball hitch. I would venture a guess the trailer "overall" length (ball to aft end of bunks) is close to 27 feet. I'd venture another guess and say the dimensions you have mentioned are the "limits" of hull length that model trailer will accept. If you have a concern why give the factory at Woodinville or Spokane, Washington a phone call and find out for certain.