Eotech 512 will not hold zero - EOTech 510 Series 512-A65 Holographic CQB Weapon Sight

Eotech recalled optics for failure to hold zero until Mar 2017. When using sight made in Nov 2012 this winter (Dec 2017) to sight in a AR15 it could not hold/return to zero in cold temps (worked in desert temps and more mild weather before that). It was way, way off even for shots well within 50 yds. As an active duty military member, I consider it to no longer be at all reliable. Imagine my surprise when a google search to do a RMA first returned news of a lawsuit against eotech for the exact same issue. Contacted eotech to return. Told that they ended the program when settled lawsuit (absolved legal obligation) and I should have checked their website before then. Why would I check a website to submit a repair request before I was aware I needed a repair? Why did eotech not inform their customers for years when first discovered or distro an email notifying me of their flawed design for a registered $450 product (which rep stated could not be fixed) when they were outed publically? Obviously to minimize their financial loss due to their own immoral trade practices. Since then, I have also read eotech HWS have proven unreliable for moisture issues due to nitrogen leaks they knew about when I purchased my HWS (also not fixed). Unethical business practices at best - Pick any other manufacturer if you want a reliable sight when you need it or for them to stand behind a sight they knew was flawed when sold!