Are you sure that, except for the steel/gold changeover, you are swapping gen-for-gen & same model/version parts for same model/version parts? If the gold bezel sits lower than the steel bezel, something does not sound right. And are you sure you have the right tube for that version of the crown (600 vs 603, 701 vs 703, etc.)? That is usually where you run into problems fitting a crown through a tube. The only fix I know of is to ream out the tube. As for the bezel/crystal, I would check your parts to be sure you have the correct pieces before shaving anything down.
Can you be more specific as to which DJ model you are working on? Which gold bezel? Fluted, flat, etc.?