Yes this works. It's what I have done to some of my non Omnis. There are a few strategies to block the airflow in an Omniesque set it and forget it fashion. For partial blockage, you can set the X-Ring on the condenser lined up with the air intake hole. The degree with which you block the hole determines your restriction. This still allows the use of the air intake with your finger. For a fully blocked air intake, place the X-Ring between the air intake hole and the tip. After lubricating the X-Ring and placing it approx where you want it you can adjust it using a straw to go around the condenser, inside your midsection and push the X-Ring into the exact position.