Vintage RCA Projector Big Screen

[stushug]

i"m having a problem with the centering setup. The service manual says to use an Indian head or other image to center the image, but I have no way to generate one. This is supposed to be done before I finalize alignment with the convergence board. If I set the centering magnets back to where they were based on the white paint from the factory, the picture ends up off to the right. What can I try?