Adapter making effective OXO Olive pitter

The product [OXO Cherry/Olive pitter](https://www.oxo.com/products/preparing/fruit-vegetable-tools/cherry-olive-pitter) miss half of its function, I bought it in [Amazon.ie](https://www.amazon.co.uk/gp/product/B000NQ925K)), It works well with cherries, but olives break because it press to the olive over a 3D _circle_ (convex surface against convex surface of the olive) squeezing any type of olive badly toward the nut. It works with cherries because cherries have a strong skin and soft pulp that