Don-Jo has a minimum order requirement. Orders smaller than the required minimum have a longer lead time as we need to consolidate onto a stock order. If you need a faster lead time, simply exceed the minimum order amount.
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I generally find that modifying a strike lip by cutting or grinding does not give the desired results because you're not easily able to replicate the proper sort of curvature nor bevel on the face of the lip. Additionally if you have a fire-rated door that of course would violate the integrity of the fire rating of the opening by modifying the hardware in such a way.