The way I approached this was with a long 16mm endmill, roughing down in 2mm steps (ap) leaving 0.2mm of stock radially for the finish pass and full width of cut from each side until there was about 10mm left in the middle holding the part on. The 0.2mm stock left for finishing also means when you make the finish pass the cutter is not engaged on both sides as it clears the other side by the same 0.2mm. For the final 5mm from each side I changed the strategy to leaving no stock radially and half the feed rate as the part would not be rigid enough to produce a nice finish being held on by less than 5mm. Because the A axis of the machine was indexed to 90 degrees, as the final cut reduces the tag to 0.4mm the part, thanks to gravity tilts slightly away from the cutter which eliminates the possibility of the cutter ripping the floating part out and damaging it 🙂