Just bought the Bug plastics for my TAF and found that the Pop Bumper caps on my machine are only secured by one screw each! Looked in the manual for the correct size but no joy there. Anyone know what I'm looking for? I've been on one part sellers site and they come in two lengths, 1/2 inch and 3/4 inch. Thanks in advance for any advice. (I'd remove one of the screws for reference but the Machine is at Flip Out and I'm not due there any time soon.