a Wizard Rotary Tool Worked very well for me to cut that lip off. And after bending my sheilding to shit...i decided to leave it off. BTW This is a BIG ASS TIP. If u sand the lip off....clean off the dust that it makes...becuase the dust DOES show on the outside (for the crystals and halo les of course) and beleive me it looks like shit. So clean before u put the sheilding back on.