Well, I've been up to silly things lately. I designed a tiny ATC spindle for my xzero mini raptor (which itself has been heavily revamped). As the title implies, the spindle is ISO10. You don't realise how small ISO10 is on a computer screen, but when you hold a 22mm 3d printed face mill with 3 CCMT 0602 inserts in your hand, you suddenly go "oh".

Now it's time to make a real one.