lid to push vegetables in a blender cooking robot like magimix

the lid of my blender broke.
(confusing words in 3D : blender, slicer, mixer...)
it is banana shaped ,
thickness=e , heigh=h
2 compartiments of angles a1 and a2 ,
banana curved radius r1>r2
These are the parameters at the top of the openscad file.
to adjust, you can print a model with little heigh.

TODO: improve it on
- slanted edges for easy printing
- rounded parts for easy cleaning
- real usage