Quoted from daveyvandy:3M Super Strength Molding Tape, 03614, 1/2 in x 15 ft amazon.com link Ā»
This is what I have used on mirror blades recently. You can skip the screws entirely with this. I would recommend using clamps to hold the mirror in place on one side while you tape it on the other. The stuff is extremely sticky and it should stay in place.
Thanks for the tip!! How many strips did you use for each blade?