Originally Posted by
Hatsuwr
Well... That was fun. Probably going to drill out the holes a little and replace with M6 aluminum rivet nuts. Pairing that with 12mm long zinc-plated steel hex screws, hot dipped steel/neoprene sealing washer, and aluminum based antiseize - should prevent any future corrosion issues!
No point in going up to M6, unless you duffed up a hole removing it. You would be forever drilling out holes in bottle cages/accessories, since they are sized for smaller M5 screws.