Got my new Leshiy today and installed the Huma regulator and did the trigger job. My next issue is I can't get the EDMU to come on. I have watched about half of Ed's 36 minute video on the EDMU where he shows how to open the unit but can't get the cover to pop off. Is my power on issue just a lack of installed battery. This is a picture of the access hole which did not have a cover but does seem to have a little bit of black something in the hole. Bill