Thanks folks for the replies. I think there are a myriad of ways to do
this. I really don't want to hack up the wall too awfully much to install
2x4 blocking and was really hoping to avoid using a french cleat system
(although for my shop, I intend to do just that.....once I get a shop

).
Although in saying that, I will probably go that route or something similar.
And I was really hoping to have all of these up today.....sigh.
Cheers,
cc