I have a Moto X on AT&T. I was thinking of picking up a Lumia 520 to play around with WP8, and also as a backup phone and media player. So, I'd like to be able to switch my SIM card between phones easily; unfortunately, the Moto X uses a nano SIM while the Lumia 520 uses a micro SIM.

I have heard many conflicting reports about SIM adapters damaging SIM slots. (I know NOT to insert an empty adapter into the SIM slot!) Does anyone have any experience successfully using a nano-to-micro SIM adapter specifically with a Lumia 520?