Correcting the problem calls for elongating the screw hole in the bridge with a rattail file
, and using a mill file to break the leading edge of the bridge at 45 degrees.
It helps to file out the flange inside the coupling with a rattail file
so it slides smoothly on the conduit.
Use a round file, called a rattail file
, for fitting tight curved profiles, and a combination flat/half round for all other trim (Photo 19).