APT High speed, high hardness end mills - anyone used them?

[Voicecoil]

They're the 4 pin style, like the cursed Peugot things, with a centre boss that's designed to shear off if you try welding anything onto it Thanks for reminding me about the quirk of stainless, I learned that a few years ago when making an underwater camera mount for one of the Springwatch guys: yeah once you start you just have to keep going 'til you're through, no job for the fainthearted ... which was one reason I want to get a decent strategy planned before I press CYCLE START.