Filleting paths that intersect each other?

 From:  Frenchy Pilou (PILOU)
8376.12 In reply to 8376.11 
@Stefan
the same than 3 cylinders ?

So what is your trick for your 3 crosses ?
(who works fine also for me :)

OK I find it ! :)
Union A & B
Then Union C
And not Union A, B, C
???

EDITED: 14 Apr 2017 by PILOU