I have been trying to remove the drive shaft off the frame and I'm having a problem with the screws that are on the drive shaft joint. Super tight and I've been hitting it with penetrative lubricants but no luck. The picture below is rotated but I'm talking about the nuts closest to the top. I started to slip off and felt like I was stripping the nut. Not sure if I should be using a chain wrench, but so far no luck with a pipe and vice grips.