Compak grinder question

Hi BX'ers, I'm wondering if any Compak users out there can answer my question.

I have just purchased a Compak K8 and have noticed that the grind adjustment locking screw tightens directly into the metal part of the collar. Is this how it is supposed to be, or should my grinder have a rubber stopper or something at the end of the bolt?

It has already made indentations into the metal with only a few adjustments being made and I can't see it lasting too long like this.

 

Thanks in advance Troy.

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