Jeff, since I'm having problems with the 'base' in moving this to Bryce (see my post in Bryce forum), I feel pretty sure that there is a 'base' which may be taken from the head geometry. Since I'm not a modeler AT ALL, I'm not sure exactly how/what, but if you look at the Nene4.1.1 transmap 'seeme' that comes with the download, you'll see what I mean. They ARE just awesome, aren't they? Diane B