I agree with Need2know on the tool kit. I was playing around with my XM 18 3.5 non flipper yesterday,change the pocket clip from tip up to tip down to see which method suits me the best. And to my amazment both screws were acutually loose! Well I tried tip down, not for me on the non flipper, then re-installed it back as tip up configuration, however this time a drop of Lock-tight was placed on each screw before tightening down, glade I checked.