Moai making alot of noise when raising/lowering the bed

hey all
i changed to the new bed and vat and while calibrating the machine (as it had been moved a few times as well) i noticed its making a fair amount of noise that i dont recall it making in the past.
i took the new bed off and it still makes the noise (i know thats not it)
the sound is coming from the lead screw/motor
i sprayed some silicon lubricant on it, no change
any suggestions/ideas or is this normal now?
thanks
heres a video

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