Hi all. I see a few related topics on this. Who else is replacing 12 speed chain when chain wear gauge is at 0.5, this is on a Park tool CC 3.2 gauge. -If I leave it to the 0.75 will it be too much wear to still run a new chain on the cassette? Only get like 1700km on the chain, 3months of usage which isn't much. Or is it better just to replace once it comes to the 0.5 and then possible 3 or possibly more chains runs on the same cassette?