A mixture of D&R Rowland and Windsail in my Savinelli "O" grade bent smooth freehand, gifted to me by a forum member from Canada.
I've noticed that this pipe has continued to improve with every bowl. Either that, or I've improved in my technique with it or maybe both. Anyway, this is probably my 'highest' end pipe. I value it for its appearance, its representation of piper's generosity, and a growing appreciation for its smoking qualities.
The conical bowl and the draft hole so near the bottom as to almost pinch it off, has taken me time to grasp and manage.