I use Siemens MS128 & HS180. I need to place a lot of TO-252AA, SOT223, ... components. At the moment I use only mechanical centering but I want to center these components opticaly. There is no problem to center chips and other symetrical components but I cannot write a model myself for asymetric components. Does anybody knows where it is possible to find or to get model samples for asymetrical components.