Cameron Fielding

This is well written and easy to understand how to exactly layer. That being said, understanding what layers on top of what isn't so easy. Check out this density chart here > https://www.smartblend.co.uk/alcohol-density-chart

It has a table of the most popular spirits syrups and liqueurs with the colour and gravity of each one. You also have graphs to better understand what layers on what which I think will be very helpful for people trying to understand this.