Tuning Pellet probe adjustment on TM1000

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This is the pellet probe on my TM1000, when pushed all the way forward it doesn't snap the last little bit to seal against the rifle, like it had before. Can I loosen that grub screw and turn the probe out to where it seals, then snug up that grub screw ? No info on that in my RAW manuals. Thanks for your help.