I don't know about you guys, But "DUDU" scares the living crap out of me!
Just, LOOK at that face! CRINGES and even worse when he greets you:
"MUUUUAAHAHHA! ....... What do you need?" - Just nope - nope - NOPE!
So, like whenever I have to get my weapon enhanced, I wait for the other npc to be there. Now- She's a little cutie-patootie! Even better still, I get decent results with my weapons.
When I tried with DUDU.. ..............." That didn't seem to work"....................