I could be wrong, but I think Picture 10 of 11 shows the guide-rod/recoil spring not seated all the way against the barrel.
I looked at the order in which my photos are displayed in Dropbox. The Photo that your are looking at (#10) is a photo that I took of the RSA (Retun Spring Assembly) AFTER HAND CYCLING the action a half dozen times and then carefully removing the slide to examine the spring's resting position. I took this photo to document the problem and to show how the spring pops completely out of the retained position when the action is cycled.
I have further written the explanation on the photo of the spring itself and have ADDED CAPTIONS to several other photos.