Inov-8 F-lite 195s only have a 3mm differential, so it just occurred to me that one could zero drop them by putting layers of moleskin on the bottom side of the insoles. I know, 3mm is nothing. But after running so much in the Trail Gloves and huaraches lately I noticed it on the flat, smooth sections of trail today just as I did during my run-commutes on a paved bike path last winter. I thought I'd mention the idea, since this seems like the easiest way to get a good zero-drop shoe with some rock protection until the Altra Lone Peak ships.