Hey guys need input

My brass idle mixture screws are a little chewed up so i went to local speed shop DALES in hesperia ca the sold me a pair of the steel cadium coated large head screws p/n 26-101

Turns out they dont fit unless i grind the heads to recess in metering body other then the large head seem the same should i grind em or get the brass style ? Carb is holley 2300