Guys, when I first mounted my scope I used an accurate torque screwdriver to torque the mount screws and the tube screws. Is there a need to re-check this once in awhile? I just assumed I'm done, but I did notice my screw-on "shade" I think its called, screwed onto the scope to shade the lens, was loose after a couple hundred rounds. Got me to thinking whether mounting screws need to be "re-torqued". What's your experience with this?