Actually I can find no markings what so ever. Here are some links to pics. Any ideas on which you would go with. I am guessing the two that are near each other but I see nothing in regard to polarity.
You site is amazing. I have been lurking for a while. I actually have a version 3 circuit built and ready to test but am waiting on one mosfet to finish. Here are some pics if you would like to check it out. Thank you so much for all of the information without it this would have taken a very long time to accomplish.