Thanks Larry/Ron - also, good point about enlarging each hole for centering. My thoughts on not modifying the master:
-If there was ever a warranty issue (geez I hope not, but....) there may be some issues returning a 'modified' part with cobbled holes?? Maybe not....
-Modifying the OEM box plate - the small amount of enlarging will be covered by the master, and the holes would still accomodate an original style master if some owner in the future finds a reputable OE type master to use if they are concerned with originality. I would imagine that gasoline will not be available when a quality OE master is finally produced!
Thanks (still waiting on resolution with the vendor....)