first things first, messing with the vertics of any brush wont screw up your compiling at all, if anythign it will make a horible looking brush usally, thats why 3-point clipping is used in its place >_>
Next, why are you trying to do anything with a srf file? radiant works with .map files, or at least, thats what you work with and compile into a .bsp, the only other file type you should be messing with other then a .map or .bsp is a .bak for back ups.
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