Jointing crooked lumber on a Radial Arm Saw is safe and easy. You only need a properly tuned radial arm saw, the proper blade, a straight edge, clamps and a simple hold down. You will notice in the video that I have the feather board on the out-feed side of the rip, this is wrong because it will put pressure on the off-rip and cause the kerf to close up on the blade. The feather board needs to be on the in-feed side of the rip.