Hi, Have had this problem with my DFX. My older Eagle / Spectrum had a thicker gauge metal and never gave me any problems. White's is no different than any other US company, always looking to save cash and increase profits. They thinned out the design and now we are paying the price. No offense to anyone who thinks that a quick response and a free arm cuff is good service, but just correct the gauge to where it once was. There was nothing wrong with it. But I solved my issue by drilling another hole through the shaft, securing another bolt to it, and tightening it well. Hope this helps. Don't get me wrong guys, I love my Whites (since 1974), but sometimes you just got to say it!