I have the D06 diving light. Actually considered doing a review as there hasn't been much for it... but it has been pretty good. (As long as I get the magnetic switch fully off.)
B20 pilot here also, had it for a few years and use it everyday at work. No problems what so ever and love it!! Only thing I had to do was tighten up the ring that holds the switch in the tail cap, no biggie. Can't wait to watch your video.