After messing up with the machine countersinking the first time, on both sides, I got some offset platenuts like the rear ones to fit in there with new holes. I only needed to do this on the worst side. I needed to grind down a small bucking bar in order to get it to fit right in that tight spot. I tried grinding down the face of some vicegrips and squeezing like Vans suggests but I couldn't develop enough pressure.
