Amen- I have 3 sets of Grace hollow ground, and will grind one to an exact fit if needed- Just like 16d nails are the part of stick building construction, and stick welding rod stubs for that aspect, turn-screws and their "disposable/utilitarian function are part of good gun-smithing work- if you can't afford to grind to fit your set(s) of turn-screws, take up underwater basket-making perhaps..

"The field is the touchstone of the man"..