I think the easiest/cheapest thing to try would be option 1. Grind down the OEM screw to clear the trigger. But if it still wiggles, try for the new module.
EDIT: I just realized from the following two posts that it doesn't sound like the nut is in place. D'oh. So much for my troubleshooting skills.
EDIT: I just realized from the following two posts that it doesn't sound like the nut is in place. D'oh. So much for my troubleshooting skills.