I have made significant progress on my model. Now I have a problem at the top. How can I get a sharper corner/ clearer outline of wedge shape going to the top there (while having control off the sharpness like with edge loops)? Its too rounded (see photos). For all other sharp edges over the object I used loop cuts. But I cant get that technique to work here as edge loops would run vertically all over object and the result didnt look good. Is there a solution? Preferably also with edge loop technique not mark sharp if possible. Blender file is attached.
Object front view:
My Blender Model
Wedge Shape to the top is too rounded off:
Subdivision modifier off:
Side view object
Side view model, front edge of wedge also in side view too rounded: