Alberto, the Kenworth K123 has fit issues as well, but probably less than the Freightliner. The biggest issues with the Freightliner are the multipiece cab (it can be a reall bear to get to fit properly), and the front axle & bumper are too wide. Let's face it though, they are both AMT kits so there are going to be fit issues; but the Kenworth would be a better starting rig.