Saw your thread on RWG too. Remember, there are two screws per side of each link on the Roadster bracelet.
Might be a matter of needing to have the bracelet held firmly and perfectly straight, like I do with my vice. Screwdriver blades need to be nice and sharp. On other types of screwed in bracelet links, some have had success spraying a tiny, tiny bit of WD-40 or similar oil, waiting a while, and then trying to unscrew the screws again. Worked for me on some Rolex bracelets.