Our grips are cut to fit an "STI or Staccato" sized trigger that is .240" wide. Many other aftermarket triggers are sized for a .250" width. It is straight forward to file the grip out to fit this larger size as there are 4 "triangles" of material in the trigger shoe track that constrain the width, they may be easily filed with a 1911 barrel lug file that has 2 safe sides.
For fitting the "height" of the trigger shoe to the grip, we suggest that you remove material from the trigger shoe, not the grip itself. As always, it is recommended to have a qualified gunsmith do this kind of work for you.