Build your own turnouts

There is a company called Fast Tracks that makes great jigs for hand building turnouts, and I have built them in Z scale. Unfortunately they do not make jigs for G scale, but perhaps the techniques can be applied.  https://www.handlaidtrack.com/

Here's a video from trainmasters showing a unique layout from the guy who makes the fast tracks jigs for making turnouts

https://trainmasters.tv/programs/tim-warris-bronx-terminal-video

I'm looking for more information on building techniques, many people have printed out the layout of the rails full scale, and then used it as a template to cut and fit rails. In this scale it is not so difficult, and inexpensive to try.