Here you got a mod to turn your Zee/SLX brake lever into a full blown Saint/XT/XTR.
The difference between the above mentioned brake levers, is a tool-free reach adjust, and a bite point adjust.
1) Tool-free reach adjust:
Requires a bit of DIY.
You can make a knob with a drill press or even a simple hand held power drill, with a little elbov grease.
All it takes, is a 2.5mm hex wrench, a small piece of aluminum, and some 2 component epoxy adhesive.