SGC Registry and M101-4's
 

Can anyone tell me if they allow all the different M101-4 advertising backs to be posted under the same (M101-4 Sporting News) registry? I thought they would, just like they do with the different T206 backs being on the same registry, but when I tried to create a S.N. registry with a Famouis Barr back M101-4, it said it didnt recogonize it. Just curious! Thanks!

Brandon