Do you need to align 2 objects? Max Puliero shows how in this quick tutorial. (English subtitles are available).
https://www.youtube.com/watch?v=Q9BTPRxXlf0
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About the Author
Bart Veldhuizen
I have a LONG history with Blender - I wrote some of the earliest Blender tutorials, worked for Not a Number and helped run the crowdfunding campaign that open sourced Blender (the first one on the internet!). I founded BlenderNation in 2006 and have been editing it every single day since then ;-) I also run the Blender Artists forum and I'm Head of Community at Sketchfab.
1 Comment
Could you use a bone deformation on the piston to do this? Snap the bone to the middle endpoints of the piston in edit mode, parent it, then snap it to the housing vertices in pose mode. Then you could apply the modifier.