We might want to do that as well (for B3). It is unclear to me why we have (at least sometimes) in the past tried to align the x/y of the detector grid with horizon/vertical? Clem -- ********************************************************************** Clem Pryke - Associate Professor - Physics University of Minnesota Room 318 Physics and Nanotechnology Building 115 Union Street SE, Minneapolis MN 55455 Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu **********************************************************************