After finding that MMSwitch UPE stem was too wobbly, I tried it with JWICK with same result.
That left just one thing to try: clipping the small tip off the long-pole stem. Retrying the stem in Cherry black housing, wobble was now closer to Cherry black which is not awesome but not bad with film. Sound was interesting.
Not as sharp or loud as Cherry black but louder than what I expected with long-pole tip removed and tone was rounded low-pitch. It was distinct and pleasant enough to consider building a full board to try in-use.
Before that, I’m going to experiment to see if I can flatten the tip with heat so there will be more surface area slapping the switch. Definitely not open flame but maybe ? lol