The space that i have fixed is not in relation with any other gear then the metal motor gear so i can't imaging, there is no reason not to try this modification.
Last friday i found out if you press the movable gear on the machine side the noise disappears immediately, thats why i fix the gear.
I guess the helical teeths runs not synchron, because the angles of the shafts are not perfect. Any change can make more or less tollerance.
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