Gster, where did you get tires for your EA1 rims?
I've got a 1952 Claud Butler tandem with 26 x 1 1/4 EA1 Dunlop rims, and I'm nervous about spare tires.
I'd also consider grabbing another 40 hole Dunlop EA1 rim, because I've got a NOS 40H Sturmey Archer AB hub I'd respoke and hang it on the tandem along with the original Cyclo gears to make a 9 speed hybrid.