Does anyone have experience using Realwear HMT-1, Vuzix M400 and Vuzix M4000 in industrial setting (specifically automotive industry)? Is see-through display on M4000 better than occluded display on M400 or HMT-1? What about the difference in weight and overall user experience? I've tested HMT-1 and I really like them, but for some people it was difficult to find and maintain a sweet spot and they are a bit bulky which makes me worried that people wouldn't want to wear them for 8 hrs straight.
