Are you allowed to drill holes in these super blues and use regular cable clamps?? I don't like those plastic retainers either.
No, find another brand besides Carlon, better yet use 4 square boxes raised rings 1/8" deeper then the material covering the stud, namely 5/8" for 1/2" drywall or 3/4" with 5/8" drywall, that way the ring is flush w/ the finished surface to give a SOLID mounting for receptacles or other devices, nothing worse then floating receptacles that shatter the plate when plugging something in because some stupid, lazy MoFo could not mount boxes correctly.
Going back to drilling boxes to use metal connectors, years ago used to work on some office buildings that were built in 1979, they roughed in the lighting circuits into 1 & 2 gang NM boxes in the ceiling after the gridwork for the suspended ceiling was installed, they used a 7/8" hole saw into the boxes to run 1/2 steel flex to the 2X4 recessed troffers, because at the time NM cable only had 60 degree C conductors & 90 C is required into them (codes no longer allow NM above a non residential suspended ceiling) but they neglected to pull a grounding conductor in the flex, meaning anytime some poor fool like me would touch the gridwork & a gas line they would get bit, the NM boxes were not made or listed for steel connectors & it is a big red flag that there is hackwork when one sees that....
