Done about 400-500 normal travi runs now. I didn't do the quest, so khalim's flail drops every time. I moved the original one to a mule to save space.

Does that mean that it drops as a unique drop, taking the space of another drop chance, or does it drop in addition to all otherwise normal drop rates?

Oh thats a good question. My gut feeling is that it's probably taking away a drop but i dont know for sure. Probably best to keep a flail in stash or cube if youre trying to quest glitch trav. Looking forward to a definitive answer

Ill add another question: does trav have a first time quest drop bonus? I think i remember it doesnt, but again, i dont know for sure.

+1 and then some

it doesn't