Replace all open hi-hats in a percussion staff with a different note head

I would like to replace all open hi-hats (approx. 50) in a percussion staff with a different note head (instead of cross with o an unfilled diamond). Although I have already enriched the percussion instrument with this notehead and the playing instruction Open2, the note heads do not change in the layout, but have to be changed individually using the Shift-Alt up arrow key. Is there a more comfortable solution for this use case or is something in sight?

Because “open” is a special case for the hi-hat, it isn’t mapped as a unique percussion playing technique for the instrument; instead, when the “open” playing technique is present, Dorico interprets it differently in playback. So unfortunately there’s no easy way to change them all in one go.