I don't know if this is of any help to you specifically, but I keep wondering if this problem couldn't be resolved by coating each one of the copper "piano key" pads on the DSTT cart with a small layer of solder, raising the profile of the entire connector by just a hair...given the distances involved here are ~1mm or less, this might be enough to make the contacts connect properly... It's what I would try if mine were having this problem. Xlaze, you may have damaged the cart by bending it...micrometer thin copper is not the most elastic thing in the world. One small broken trace could be the end. I'd examine the board very closely, maybe use a multimeter to determine connectivity between points and see if something broke.