Convert entities

Hi All,

Just a question on convert entities I have  a small assembly attached, I have a downloaded part that has mounting holes,

I want to get a plate off steel cut that will line align with the mounting holes,

I have done this with convert entities but when I go to propagate features to part it doesn't seem to work,

I have drawn up similar plates previously but may have been by time consuming methods,

so what is the quickest way to do this, any tips appreciated,

Thanks,

Frank

SolidworksAssemblies