70 ton has a non rotation resistant cable on the main winch. Its been on there since I bought it, and I usually just run that winch with block, and run the rear winch with ball on. I put in my single sheave block with a two part, to set the sign, but it doesn't like it when you run out 127' main. It wants to unload itself and spool up/ twist up on itself.
I tried giving the becket a couple turns, which will usually make it stop, but ended up having to resort to a old iron worker trick. I got the block low enough, and untwisted the line, and then tied the upper part of the block to the hook, so it couldn't spin up on itself. Essentially using the load to keep the cable from twisting up.
You want to make sure then, that you don't have to spin the load, but I had like 12 twists in it when I tried to make the last pick, and then it wants to jump sheaves by the time you get the block up to the top.
You can see it kind of spun up on itself in the last picture in the post above this one. It seems like it only gets worse once it starts to want to twist. I should just bite the bullet and put 700' of rotation resistant on the big front winch, but what's on it is still good cable.