I am pretty sure that the X200 A uses a Lux III, not a Lux V. It has an interesting optic which projects a diamond shape - pretty narrow beam.
Not sure about the B version, but given the similar battery life, I think it is a Lux III as well, IIRC.
I am actually building up a 2 x CR2 version with U bin or K2 for my own use. Still a bit to go - there is a thread on it in the home made section if you are interested. At some point, I might need some testers to put some rounds on it before it goes out for general use.
The challenge for all of these short body lights is in the optics area - it is quite challenging to replace the 25 mm (1 inch) reflectors of a "normal light" and make them small, short, and perform. I spent the last 9 months on this challenge before obtaining really reasonable beams.