<HTML><HTML>List I need to replace the hammer butt flanges on my U1.  It has aluminum a= ction rails and the screws don't seem to go back in as nicely as they come o= ut.  I mean, I feel like I'm digging a new hole in the aluminum. = I recall having the same problem in the field.  It took way too much= work to get the screw all the way in.  I've tried backing them out a half turn first, but it doesn't help.  I= t just seems like they'll go in at any one of a number of angles, none of wh= ich is straight and true to the hole.  Any advice?  Help!  I don't want to screw up my U1! Tom Sivak</HTML>