Idea to Keep Smart Cover Attached While Using a Case

After seeing the new Speck SmartShell case claiming to maintain the Smart Cover magnetic hold when folded back I got an idea. Would it be possible to apply a small strip of metallic tape to the back of the case so that the Smart Cover can attach when folded back?
It might look tacky depending on the color, but I bet that it wouldn't take much to make it hold. I returned my Smart Cover because it drove me nuts that it would just flop around when I folded it back while also using the Feather Case.