Review on Zipline Eagle Spring Brake Upgrade Kit by Eloy Boelkens

ok Excellent reviews on this item, I spent all day installing it, everything seems quite simple. Quality hardware, clear instructions. Installs well. But at some point you have to get that tension point to the point where a 250-pound person is testing their strength. Serious? I used a lawn mower to put it on and still couldn't get the tension to the point where my 75 pound grandson wouldn't touch the ground. he was at the stated height for clearance etc. the mower was on every hip, he would pull the posts out of the ground and already they were bending. The turnbuckle can add tension, the problem is that when tightened, the cable twists and increases tension. And he can only move a few centimeters. Maybe I just got it wrong, but I doubt it, the whole "pull all the way" clause is pure nonsense.