I've also upgraded to 3/8" forged turnbuckles. Just run the ziptie through the turnbuckle and catch one of the eye ends, then it cannot spin. I also was having mine loosen up on wash board roads, tried several different lock nuts. But like I said, you cannot get your hands in there to properly jam them tight. No problem now with the zipties. Ron
Edited by nikonron, 05 June 2017 - 03:28 PM.