[old man jimmy]

to Shock Me... I don't know about single wall. I got mine early in the 72 run, so they were still using up the double walls. The doubles are seamed down the middle, so probably more important with them. Singles came out in 72 but they used up all their left over doubles before going to them. I personally like the doubles better, I think they look a little cleaner. But then again I don't take mine off.