Originally Posted by Roelof

This video recently was published and on several forums there is some talk about it

https://youtu.be/gwtZkHoVMso

This technology is not new and I wonder if some RC engine brand did try this.
In the talk on another forum I saw that an offset piston pin can do the same which is easy to implant in an existing engine.

The only disadvantage will be the port timings, it is not mirrored with the stroke down and the stroke up.