It took 3 tries but its in and torqued. First time, I missed two tabs that slid under on the front of the sight plate. Second time, the ejector lever had shifted out of place. Third time was a charm. Its in, torqued and loctited. I wiped it down with alcohol as you all suggested, seemed cleaner than using carb cleaner. Thanks all for the input, I'll let you know when it comes loose again.