Very nice looking mod David. Taking the big batt idea to the next level, and using the slotted design to keep the weight down is a nice idea. Moving the button to the top and having a lockout is awesome. The fact that it will stand solid on a desktop is very nice. Would like to see a picture of it next to a P-18 for size comparison.
I'll be honest though. I have no real desire to have anything bigger then the Precise 18650. I don't carry a purse, so something like this new mod would never leave home. I completely understand the benefits of that big battery though.
What I really desire is something slim like the P10 but has enough mah to last me close to all day at work somewhere between 500-600mah will do it. I like the P16, but slimmer is better... I really like the P10 size, but would have to carry extra batts I think (can those Trustfires handle LR510s and just waiting on the new switches for the AWs). That leaves the 14500...