I've not seen a '41 but it's lost likely pretty similar to my '38. All door fitment adjustment except one in my '38 is controlled at the hinges. The one not adjusted at the hinges is how far the door closes which is adjusted at the striker. You may have wear issues if the door is drooping. That could be as simple as replacing a hinge pin or as complex as replacing or rebuilding the hinge. Good luck with your project.

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