For those of you that want to use the Ridgid expanding cutter with a drum machine, give Allan J Coleman a call. They have made leaders with the Ridgid expanding cutter on the end. My father had Marvin make one up over 20 years ago and we are still using it.
it's actually real easy to do it yourself.
just enlarge the center coupling hole to accept a 3/8'' x 24tpi tap. drill and tap it. then the standard ridgid blade coupler will thread into it. at that point you want to weld the coupler head onto eachother. no leader, just the ridgid quick connect coupler.
i've done it for my drum and my sectional cables and never an issue.