I am trying to model some Neenah Foundry inlet grates in sag that are circular for a senior design capstone project. I am trying to use a ditch inlet type since there are not any curbs surrounding these inlets however the grate types provided do represent the types in the field, and by that I mean bar spacing. Is there a way to create a grate type or am I stuck using the one that is the closest to my actual grates? Thank you.