Nice job.
How many mm wide is the air flow hole under the coil? Has anyone tried using the KF5 air reducer kit in it to tighten up the draw? I'll try it I a couple days when my Siren arrives.
Now I think it's about 2.5mm. Just an estimate. But much smaller than without.
I still close up the airflow control of the Siren to the smallest hole.
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