Started riveting the side skins on my 14A tailcone today! I've been able to get into a pretty good rhythm as far as setting the rivets, but I'm having some problems with deformation around the holes. Before, the rivets go in there is only a slight deformation around the hole, however once set it seems to become way exaggerated (Atleast that's what I see). The shop heads are being set very nicely, so it's not a structural issue, however this deformation it's driving me crazy! To make it even stranger, I've had to drill out a couple of rivets and the second they are out of the hole the deformation seemingly dissapears and it returns to the previous state... I'm using a rubber flush set with a tungsten bucking bar (for the most part) and tomorrow I'm going to try and get help with the bucking bar. I have a few bumps here and there, but most of the vast majority of these holes are bump/dent free (I think). I've also noticed a similar effect on some squeezed rivets in the longerons so is it just due to the nature of the skin? I'm not sure if this is normal as I've seen builders with similar results, but I want to get rid of this if at all possible. I don't think it's a dimpling problem as before the rivets go in it's fine, but maybe does adding a rivet exaggerate the deformation? I've never had this problem with riveting before so I'm a little lost! Once the plane is painted will this deformation be evidently visible or will it mainly disappear? I've only done half of one side of bulkeads and part of the middle J-Stiffener so I want to try to figure this out before moving forward. Thanks!
https://photos.app.goo.gl/6qwcXts2sGDE3Ahd6
https://photos.app.goo.gl/uvn75RknDTMUeoKi8 (Before Rivets)
https://photos.app.goo.gl/YWWpgQbYNTdLLrdX7
https://photos.app.goo.gl/sa6neejQR6aKLU869
https://photos.app.goo.gl/HWeRT63UpL9bpXe28
https://photos.app.goo.gl/6qwcXts2sGDE3Ahd6
https://photos.app.goo.gl/uvn75RknDTMUeoKi8 (Before Rivets)
https://photos.app.goo.gl/YWWpgQbYNTdLLrdX7
https://photos.app.goo.gl/sa6neejQR6aKLU869
https://photos.app.goo.gl/HWeRT63UpL9bpXe28
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