I uploaded an APP Split tool I had that was made to find large Modules and Procedures. I would be curious for you to run it against your APP and see if it does identify your largest procedures.
Finding the largest modules is easy by just sorting by CLW file size. Not shown, I did add columns with the OBJ and RSC size to this list.
Finding the largest Procedure size is done using the Linker Map addresses.
AFAIK the MAP is not documented. I think I have code size and not data size.
