Your metric cries in the wilderness are starting to be heard.
We’re buying a 20 pc set of Metric R8 Collets for the Bridgeport. Would like some input into the most common size cutters, primarily for for cutting smaller cuts, common mm drill sizes and thread sizes typically used. I say smaller cutters for slots, because if you 're doing a 12mm slot, you can use a 3/8th/.375" to create it. But smaller sizes probably justify a specific sized cutter.