Very interesting feature is this chamber reducer. Only possible issue is contact with the top of the coil. Any thoughts?
The Tripod from Atmizoo had a chamber reducer, so it mght be worth checking the reviews for that to see whether it made a difference.
Although the reducer also changed the chimney diameter iirc, so that would probably have an effect on it as well.
Think the price is for 3 Bell caps 1 chimney. As the box picture shows it marked as "black" not all 3 colourseven an ordinary clone bellcap is almost that price. great price for 3 bellcaps + chimney.