The foreign currency charge is more about your credit card company according to the Olight FB group mods. My understanding is that if you bought from the Olight Store in Georgia you wouldn't have that charge.
Their charts are not completely accurate I've found. The best type of tail caps to use with the Switchback are the raised rubber clicky ones. Even if there was a Switchback that fit my Olight M2R Pro, the Olight tail cap is basically flush and could not be activated easily when using a...
I used to carry a Fenix PD35TAC with a Thyrm Switchback attached. I bought and carried an Olight M2R Pro - much higher output than the Fenix but it will not accommodate the Switchback. I've decided to get back to carrying with the Switchback.
My options are to go back to carrying the Fenix...