I really didn't notice any difference between the 3 boxes I had, but had to consolidate 2 2 car garages in to one. I didn't know what I was looking at either. Tried to give them away, but no one I talked to wanted them. The guy I bought my TA from 11 years ago had quite a few T's, and Gn's, so it's possible they were all from those. Oh well. Even if I got money for them it would be gone so fast I wouldn't even know what I spent it on...