Jeffery, To quieten down the Accucraft burners, obtain some fine mesh stainless steel,about 20 to 25 openings to the inch, cut this to a length which will fit inside the slotted burner tube, roll it up into a hollow tube using a rod as mandrel and ahard surface[ we need a single layer of mesh, so you may have to cut off any excess] Then remove the burners and slide these mesh sleeves up inside the slotted part. work the rod you rolled them up on into the mesh sleeve and get it as even fitted as you can.,reassemble the burners and test,, you will find easier lighting and no whistle, with a generally quie ter performance.
Gordon Watson.