what i think mag 89 means is there might be foreign object obstructing airflow to your valve and if it leaks it might be because you have a pmi perfect charger or your on off top o-ring the white one on the underbelly might be to large on the inner diameter of the o-ring itself if that is not the problem try a diferent power tube spacer or a power tube o-ring it might work it might not give it a shot cause it just might.
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