This morning, I spent about half an hour in the shop to complete a piece of the coupler for the Portabee. As I ran out of aluminium of the right size, brass was used instead. Machining brass is such a joy and I went absolutely coolant free. Tapping the M6 and M3 presented no challenge at all. I don't know if it's the effect of the 2 new HSS taps I got from Mike or it is just the nature of brass. And, no additional effect is required to make brass look great.
This is how it looks installed: