For those of you who have made a Chippendale chair (I took a class at Lonnie Bird's School of Woodworking in Dandridge, TN which was excellent!), you know that the back seat rail can be curved in the short dimension to match the curve of the back legs. Lonnie did this with a wide round plane. I have purchased and modified some Stanley 35 and 36 transitional planes to match the sole and blade to this curvature. If you have any interest in such a tool, please contact me.