i've recently got a pair of Evo after using the Rage for about a year. honestly, i'd be worried about stacking it in the Evos. the D3O is not as soft as i thought it would be, so its transition from soft to hard won't be so different, making any hard impact still pretty painful. i tried this by falling onto my knees on concrete - not a pleasant sensation. i've not tried it with the Rage to be fair. oddly, my opinion was that they might actually be better on sharp rocks, because they'd reduce the pressure created by...