Assuming UM2.
I've seated my bowden nicely such that it doesn't move but I wouldn't expect it to help your pictures - it helps retraction quite a bit - I now get by with a bit less retraction (4.5mm now, 5.5mm when bowden was moving on my UM2 same thing with my UM Original - bowden more secure and now 4.5mm is enough).
Instead I think you should check your Z levelling again - you need it slightly closer to the bed such that the first layer is squished just a bit more. I wouldn't touch the 3 screws - just do the levelling with the controller.
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illuminarti 18
See my instructions for inserting the tube in the clip, here:
http://umforum.ultimaker.com/index.php?/topic/4586-can-your-um2-printer-achieve-10mm3s-test-it-here/?p=40399
You might also try cutting off just a few mm of the end of the Bowden tube, so that the plastic collet has fresh plastic to grip into.
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