I aquired a Macross V-Trigger machine today and the shooter mechanism seemed to 'stick' a little bit. the white 'arm' that moves up and down would periodically get stuck in the up position, but tapping it would cause it to drop back down and work again. They did a cleaning and it appears to have fixed the issue. However I got home and tried it again. It worked for about a minute or so, and then just started making a horrible grinding sound and no longer shoots.

Does anyone know how to get into that area on a V-Trigger machine to get the plastic case off to check it? I saw 5 screws on the front but taking those off didn't allow me access. Feels like there is something keeping it attached under the shooter arm but I can't figure out how.

Any help would be appreciated.