Sure.

I think a tall, 90° cliff wall is most dramatic for the quality of the visual splatter and bits ingrained into the wall ;

whereas something like a 125° cliff wall wouldn't make good splatter display.

Here is a visual representation.

Suggestions for the type of trebuchet welcome.

Sure.

I think a tall, 90° cliff wall is most dramatic for the quality of the visual splatter and bits ingrained into the wall ;

whereas something like a 125° cliff wall wouldn't make good splatter display.

Here is a visual representation.