Received my chrome pocket mini today, for a 200mW 520nm build. It took quite a while due to shipping delays from China, but I'm happy with it.
Impressions and comments:
The host is very good quality for a mid/low-range chinese host. The threads are really good (not noticeably gritty) and the machining is high quality.
The host is quite small. I really prefer it to larger 18650-sized hosts.
The copper heatsink is pretty beefy. The set screw hole had some burrs, which I had to file off with a nail file before it would go in the host.
I had a really hard time getting the LED off for some reason. The adhesive they're using is relatively very strong. Normally those LEDs just slide right off. This one took a *lot* of prying. At some point I thought it might actually be soldered on.
I also couldn't get the brass ring to come out. In the end, I used a punch to knock both circuit boards out of the pill (the punch went through the wire holes). The damage to the battery contact board was minimal, and the important part (the battery + contact) was undamaged. I ended up just leaving the brass ring in.
I had a problem where when I unscrewed the battery tube, it would unscrew the pill a bit as well. I fixed this by putting a bunch of loctite blue in the threads, and then wiping away the excess with a tissue. The remaining loctite was now in the pill's threads, and the pill stays in place.
The result is a very heavy/dense and high-quality feeling laser that fits easily in a pocket.