Your bike is lookin' GREAT there, Grzegorz!

Love those 12incher up front. And, I especially like the wider 21 inchers.
And re the fender...I'm thinkin' if you maybe cut it down a little, like I did to my front fender here, with maybe the front part being a cut that's perfectly horizontal and straight out level to the ground like this...

...then maybe you could still use your stock fender and not have to go with an aftermarket one?