"Must"? Hmmm, there's a can o' worms.

I haven't felt the need to do anything to my Kimber Eclipse Custom II. Then again, it's my 1st & only. I have felt better triggers on others, so I might go there. I didn't care for the sights at first, but I've learned to shoot so accurately with them that I'd be afraid to screw them up now! I think you & I started far enough up the 1911 food chain that we don't have to start with the upgrades all that soon.

I trade with others at the range to see if I like how theirs shoot, then see what they've done to make it like that. I also spend more time at the gun case now than I did when I bought mine! I might find something so cool that I'd be inclined to tweak mine.

I like to think of it as having a girlfriend, rather than a wife: if you see something you like better, feel free to upgrade what you've got! Only in this case, you can do it 1 part at a time.