After reading this forum for the past few weeks I'm still confused as to who has gotten where with their replication attempt. Otto's ust looks like an inductor to me, but then again I did not see the whole design. The other guy seems to have made progress with his wooden core design, but I don't know how his has gone, or how far he has gotten =/ I found a patent on the MPI website that seems to be like Steve Marks' device, except it uses a ferromagnetic core, or did he use one, too? I don't know. But with these designs that you a replicating, you are putting 12 volts in to drive the electronics, are you sure that the power supply isn't indirectly supplying the load? I was wondering because that's the thought that keeps popping up in my mind. SM used nothing to drive his, didn't he?