I've had three cable drives, all got borrowed and died in the borrower's hands porting automotive heads. (Dwyer, Dremel, Craftsman). Gramps had a Dayton I think.
I like the cable over a handheld unit though. It gets into places a hand motor can't.
Keeping the cable straight decreases friction, and wear as well.
Graphite is messy, in it's place, I've moved mostly to a Boing plane aleron dry lube spray, teflon based, dries to a very thin milky waxy coating, not cheap ($15-$30 a decade ago) "T-9". This stuff is like magic at times. Penetration while wet, dries fast. Even unexpectedly freed up things Aero, crow, and PB Blast could not. Plastic safe too.