Late reply here I know, my internet was down and I just got it back. Anyway I contacted Leetmod, got a replacement, and now have my new card. Had it for a day and a half so far and no PSRAM errors. As for the last one I tried all the recommended options (Other than the foil one.) with utter failure. Strangely enough as I said in the first post it was always the SAME address I got the error, never was it a different one. But looking at a different topic here regarding fake Supercards now floating around I'm starting to suspect mine could have been a fake. When I look at this one there's some things I don't quite recall from the last.
For starters, the little groove on the right side of the card (When you look at it from the front.) I don't think was present on my old one. Also on the back of the legit Supercards there's a little plastic indentation directly above the screw, I think that wasn't there either. But considering the frequent PSRAM errors I was getting and the fact games would randomly hang too makes me even more suspect that it could have been a fake. Well anyway... I'm just keeping this card and buying a CycloDS later... Supercard's nice but I had to go thru too much trouble to get one and then return it for a new one. And if my replacement DOES turn out to be a defective one I don't want to have to repeat the process again, and quite possibly, yet again...