I am fitting draws to my new router table and have never before mounted full extension slides.
Here are some good reference videos about the topic
This guy really makes it simple
And here are two videos by famous Charles Neil that gives a good overview of the whole topic with loads of little tips. No too much in the way of actual practical how to detail but very good overview if you a rookie like me.
And a source if you need it, not the cheapest but hey they close and work properly. You get what you pay for says Charles.