Sonoff Basic Decora Light Switch Adapter

This is a work in progress for those of us who use Sonoff Basics combined with regular light switches to make it into a cheap smart WiFI switch. Here is a video that explains it: https://youtu.be/ab472a40-co?t=369 Basically, you're wiring your regular light switch to the low-voltage GPIO on the Sonoff. Then the light switch controls the relay on the Sonoff which controls the lights.

I printed out the model and it fits my Sonoff Basic perfectly. I know that there are multiple revisions. This o