It is easy.  Steal ring toy from a baby.  Cut it in half.  Glue to carb filter.

 

2 hours ago, 240260280 said:

It is easy.  Steal ring toy from a baby.  Cut it in half.  Glue to carb filter.

 

You omitted apologize to the baby and cough up the replacement $ to the baby's mother who will be dealing with a screaming child.

This might belong in its own thread, but it fits here, too. This stack design goes in the opposite direction of the familiar approach, using dimples to change airflow characteristics.

https://custompolycast.com/