Studio Spot 575 - Issues removing motors

Hi,

I'm trying to do a complete breakdown and clean of quite a few 575's and am running into issues with removing the stepper motors where one screw on each seems to not want to move, and obviously I don't want to strip the head as drilling it out would be more work.

I'm wondering if a dab of glue is placed on one of them which is causing the issue - either that or I'm just having a run of bad luck with the 14 or so I've tried so far.

Anyone got any suggestions?
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