So Im wondering if anyone has tried this before, Adding magnets or a magnetic strip of magnetic tape, to the back of a folio case so that the smartcover part stays closed when opened. Heres a pic where the magnet would be

Done it many times, most recently with an original leather Smart Case for the iPad mini 2. I refuse to use a case without this feature
What did you use exactly? Magnetic tape or...? Could use some help on what to use lol.