Similar to doing the CHF, I've changed a lot of sway bar links over the years. How easy or difficult it is to align the second link with the bolt hole is a function of how level the ground is and how level the vehicle sits. With everything level the holes align with almost no effort. The further off level, the more difficult. Completing the CHF in 20 minutes is probably a stretch that only includes the actual "wrench time", and not the prep time to get out the tools, etc. The difficulty will also differ depending on the condition of the hardware. The more rust, the more difficulty...