hi
I use the destockable ethernet câble 7a on all my towfish, the last use : 100 m with hélix 12 G2, no problem, and now 50 m with an hélix G3...verry good !!!
but on this câble the sheath that surrounds the wires was sensible to cut.
you must take care on jonction seal and do not take a verry small curve or fold it.
this câble is good and no expensive solution if you think change it frequently.