I'm trying to build the set 42154 (follow the manual) and I'm on the engine part. You can check the attached model in progress. In nested mode when I select 3 parts (block, piston, rod) the result is the same
42154 Ford GT.ldr (Size: 6.57 KB / Downloads: 5)
![LDraw file .ldr](https://forums.ldraw.org/images/attachtypes/blank.png)