Slawney, it was my post that recommended using the two different wire gauges (thin hot, thick return). However, not for ICs but only for speakers cables. In my system it produced better bass.
My Japanese speaking friend is going back to Japan next week and may visit Mr. Kimura again. While there he can ask him (not the distributor!) directly, if the thicker cable would make a good power cable. I would call Mr. Kimura myself, but he does not speak English and my Japanese is rusty. The last time my friend was there Mr. Kimura gave him the exact power cable and another experimental cable he was using in his reference system. My friend gave me the cables, but I have not used them as the gauge looks too small-might start a fire, although the insulation is thicker than on the OTA.
What might work is to hardwire the OTA to the the component and attach a plug at the end and plug that end into your favorite power cord. That way the first power cord can dampen the mechanical resonances and the OTA can further refine the filtered power.