How hard do you have to push down on the RMR using a FCD plate to get it to fit on the lugs or posts? I've read elsewhere about a "click" in place type of thing, but man, I'm too scared to push down that hard. Is there maybe some minor fitting that has to take place? This is a RMR type1 on a G19. Going to do a Swampfox Justice on a G45 next. Thanks for any help!