Yes to make this work I needed to glue 2 gray axle screw nuts on a metalic silver technic connector...so I could screw these parts down so it lifts the trailer from the truck. Sadly no room for any PF or pneumatic cyllinders :/ For those who hate it... I also cut in some lego :D Was impossible to make without some adjustments, that's why it's the first of his kind :/ no hate :(