Italiari kits are ok but the US rigs have gineric chassis and engines from the freightliner .I prefer the AMT rigs and revell the detail is much better ok they have there problems but nothing to bad . If you want a tough rig to biuld get a ertl DM 800 mixer its accurate but nearly every part has to be worked to fit perfectly ! with a lot of work they do make a very nice rig .