I've had the same issue on several Daytonas - I've just replaced those screws with cap head bolts (titanium as I'm a tart).
Yes they are very much a love or hate on the marmite scale but I've had the fake stealth mirrors on from when they first appeared on the market, but I always hated the pivot joint as it can move and when you adjust it can become loose which means undoing them, tighten the bolt on the bottom and refit, its annoying. I've always suspected that the ones Rizoma makes for other brands would fit, so after looking at the measurement charts on their website and the holes on the bike I got a set off Aliexpress because I am not guessing when its 400 quid, turns out the 60 quid ones for the 2018-2019 BMW S1000RR fit The threaded studs they come with are only 20mm so far too short, need at least 30-35mm so you can fit the nut on the other side, but they fit. Middle finger to Rizoma on that one. Will I be able to see out of them, who knows, I'll find out how decent they are compared to the other ones once I've got the correct length studs and bolted them into place And also in the post today I managed to get hold of the twinlight driver, which was a device that isn't made anymore that lowers the power to the high beam and thus you can have dual headlights, I'll look into the wiring on the angel eyes over the winter but for now I can at least have dual headlights on when riding.
