For you experienced pros in welding:

My buddy has several tips [the brass push on/off piece that covers the copper electrode] that is has ground down at about 45 degree angles. Some have 1 45 degree angle and some have 2. He tells me these are for welding corners and places where the full cone shaped head cannot get into. He has a MM 252.

He is not a professional welder, just a home user.

I have a few folks about this and no one seems to know one way or another if this makes good welding sense.

What do you guys think????