I am not seeing where you peened the pin at all in your post,,,
The Dovo pin system is rather easy to use the locking washer that they supply works very nice but you still have to peen the pin in there,,,
Slide the washer down the pin so the cup is toward the scale then push it as tight as you can get it on there, clip the pin, file so that there is barely any thing of the pin showing (the washer will crush as it tightens) and tap away with a small Ball Style Hammer...... DONE !!!!
More reading and Pics::::::
An Illustrated Guide to Un-pinning and Re-pinning - Straight Razor Place Wiki