Cowbell noteheads

Is there a way to get all cowbell noteheads closed? I’m seeing them default to closed for 8th, and greater, notes; open for 16th and lesser values.

I’ve looked through the percussion kit setup and can’t find a way to change it to assign the same notehead for all values.

Thank you.

Doesn’t work?:

Don’t override the noteheads manually. You can edit the appearance of the playing techniques for the cowbell instrument directly:

Thank you, I understand how to set a playing technique, but how does one set it for a specific note length when there is nothing shown in the default dialog? Where are the open vs. closed noteheads coming from?

Notehead editor:

Playing techniques editor:

Well well, mea culpa! At some point in the past I added an open notehead for anything of 1/16 (semiquaver) in value. I found it in the notehead set editor (Library > Notehead Sets).

Apologies and thanks for the replies!