http://jwm.de/afu/index0.htm
Decided that I should do the dissect on my MH-31 last night, couldn't wait really but there was a setback, I couldn't really understand the instructions on modifying the tone switch, but after confirming with OM Joachim, I went ahead with installing the Clipper into the mic. Here is what we should do on the tone switch, shift the two wires to the left, and the wires from the tantalum cap goes to the free right most pin.
Here is the module, installed inside the MH-31 replacing the condenser mic element.