Good answer. Thank you.

So I tried to use an F spring for the as showing in the "animation_MainBody" video from 0:29-0:32. Only one spring/screw are shown. When I attempt to use just one spring the servo is off axis and the compression required is significant. So I'm not going to this until you respond. Am I suppose to put a spring/screw on the other side too? It makes sense but the video doesn't show this. With the compression so high relative to the small screws and the board material it makes me think the screw is going to get ripped out of the board. Am I wrong? It seems to me the shorter G springs are necessary but you favor using the F spring for this purpose too. I look forward to your thoughts. Thanks, Eric

Talk about hiding in plain sight. There they are. Thank you. Case closed. Eric

Rongzhong, If this picture is not what you're after, coach me and I'll send another picture. What is the "back ID"? You may have meant "pack ID", I don't know. Reading other posts, there is suppose to be a handwritten number on the box the kit came in. I don't see a hand written number on the box if this is what you're referring to. Let me know please. Eric

I appear to be missing the plastic screws with my kit. I'm still cataloging the pieces. Is there a single parts list somewhere? I'd like to use it to determine if any other parts are missing. Also, I don't have a hand written number on the shipping box. What's the process to obtain missing parts? Thanks, Eric