[TowerTalk] Buried conduit pull rope

[Steve K7AWB]

I am going to bury some heliax and coax
cables in conduit and I'd like some advice on Pull ropes. I think I'll use two of them so that in the future I have redundancy since once these are buried for 200 feet, it would be impossible to dig them up again. What do you suggest?
By Pull ropes I mean both nonmetallic ropes and maybe metallic wire such as guy wire or something like that.
Steve k7awb