I'm trying to create the model for the below picture. I'm having a hard way how to go around doing this. At first I thought about doing the main geometry and then adding the flutes to the surface afterwards, but I'm not entirely sure how to do this when it's a curved surface (see attached part). I also thought about doing it the other way around by making the slot body, adding the flutes, using deform/indent and then making the rest of the model, but I haven't gotten it working right.
I hope you guys have some ideas on how to proceed