So i decided to flip my stem which i do it and feels great, on the other hand i think i mixed the faceplate screws up and the screws to the back of them stem, long story short the shorter screws fit in the back of the stem fine and get tight. but when i put the tire inbetween my feet the stems loose and goes back and forth, when i try the longer screws then go in and just keep spinning. Did i strip my stem like i think i did or am i using the wrong screws or doing something wrong? the cap on top is on tight.