I'd like to trim mine to the flat look I've seen on some jeeps here but it seems like the stock plastic is quite rigid and might cause some bending of the panels near the mounting points. Found a discussion awhile back that talked about the difference between soft fenders and armored fenders. There was some mention of stiff fenders causing some bending due to the fact that designers of the different fenders don't take transferring energy to the substructure into account.
Have you experienced any bending at all with all that scrapage?