from what i have read, the 97B NEEDS that tiny piece of metal, the spring loaded pin rides in.
meaning, you can lose the pin, but God help you if that tiny piece of black metal goes MIA....
which is why, you wanna check the tightness of that tiny little allen screw. mine was built in 2020, between January and June when i bought it. SOoooooo, they may have used Locktite on that tiny little allen screw. but, i still do not chance it, i put a small piece of black electrical tape over that allen screw, to at least hold it in place. i apply a new fresh piece of tape with every cleaning.
be VERY CAREFUL if and when you check the tightness of that allen screw, if it IS tight, you stand the chance of stripping it out with force.
ok, see that "square piece" of metal? you will also see the allen screw and the indicator pin..lose that square piece of metal, order up a new one with the indicator pin and spring, from CZ
