I just received one secondhand. Neat little light.
Chris has an amazing assortment of tubes, tails, and a 27 mm head on his site as well. The head has a unique construction in that the LE screws into a module that threads into both the head and the tube. Only a small portion of this module (3/16" or so) is visible on the exterior. So the LE can either remain in the head or tube depending on what you're swapping out.
The tail is Aleph and E series compatible, so it's a cinch to upgrade to a McE2S.
The LE is compatible with Chris' KeyLux line and 0.55" boards. I immediately swapped out the LE with my TnC Li Lux V light, and ran an RCR2. It yielded a smoother beam than the AA Li Lux V.
The stock LE/reflector is impressive for a Lux I, very nice throw that belies the size of the head (20 mm). More than you'd usually demand from a pocket light. I reverted back to the original LE and a 2-stage Aleph trim tail with a clip attached. It makes a very nice pocket EDC.
An indication of the performance of the reflector is a comparison with a TW4 (L4 head on a single cell tube). Running Lux Vs and Li-ions in both, the output is comparable, but the deeper, smoother SF reflector yields a much tighter hotspot (for a Lux V). One thing I noticed is that the Li Lux V LE doesn't work with the 2-stage tail. It only comes on on hi.
Fit and finish is what you'd expect from Chris, his usual superb.
MSax, I know we're not helping with your search, just whetting your appetite more. It will be worth the wait.
I don't usually post this type of stuff here on CPF. Usually people that happen to come across it will post if they want other to know about it. Sometimes they don't post until they let their friends know first. I don't believe I posted anything here about my new lights. 
