AutoCAD 2010 :: Suppress Extension Lines For Radial Dimensions But Not For Linear

I am using AutoCAD 2011.  When I create a radius dimension on the inside of an arc, and I place the dimension beyond the center point of the arc, AutoCAD automatically draws an extension to the arc and points my radius dimension leader to the outside of this extension, rather than to the inside of the original arc.

I don't really like this.  I prefer for my demension leader to point to the inside of the original arc.  I can get exactly what I want by going into "Properties" for the radius dimension and turning the "Ext Line" property off.

Rather than having to do this every time, I'd like to create a dimension style that would give me this functionality all of the time.  When I try to modify my dimension style, I see that there  are just two parameters for Suppress Ext Line 1 and Suppress Ext Line 2.  These seem to apply to both linear dimensions and radial dimensions.  Is there anything I can do to suppress the extension line for radial dimensions only and not linear dimensions?