your tip of cycling the action when the button gets stuck was the ticket! Goes on every time now. Practice also helps,lolLine it up with the take down button about 1/2 covered by the cover (so you can see top half of it) push it forward then down once it clears the lip at the rear of the receiver. If the button doesn't pop out just cycle the action while holding down on the dust cover. It usually just pops out. It gets easier and easier the more you do it.
