How hard to press shinobue against lower lip

Q & A: How hard should I press the shinobue to my lower lip?
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Answer: I used to press my shinobue pretty hard against my lower lip, but I realized that this could cause a mark on my lip. When I consulted Bunta sensei, he said that he doesn't press the shinobue to his lower lip very hard since this can cause pain, especially when playing for long periods. So now, I press the shinobue to my lower lip just enough to stabilize it, so that it doesn't move around while playing, but not so hard that it feels tight. It's important to experiment with the pressure to find the perfect amount. 😃 One of my students says he used to press it too lightly and when he started pressing it harder, his kan on improved.