This just keeps popping up, lol. Rich Hernandez, as has been noted by kkkriverrats and brassmagnet, wore out his welcome on this site more than ten years ago. As one of the targets of his ire, I can tell you he was banned by the then-site owner for his behavior on this forum, and that's why he is gone. Before that point, he was already banning some members of this forum from his own site, the forum portion of which is no longer active (so far as I know.) Most of us didn't have a beef with Rich, before he inexplicably turned on some of us, for reasons I could never get him to explain. He alienated many people here. That said, here is the important info about his products, and my guess is that this is mostly what you want to know.
Rich makes very innovative, high quality mount adapters. His ability is first rate. Several folks have tales about bad faith dealings with him, and others just say they have gotten product but that one has to be extremely patient sometimes. Others have had good experience dealing with him. What I would tell you, if you are looking at his products, is that you will be very satisfied with the hardware, so long as you are able to have a smooth transaction with him. I never tell anyone not to do business with him, merely to be aware of what some have experienced. But his workmanship is top notch, so if you can get it, you will do well.